Sort by
Relevancy

Free Stories

50%
LE PROGRAMME D'ÉCHANGE SISSY ⚧️ ⚧️
Kristy a travaillé pour Le Matriarcat. Cela semblait plus officiel que ça ne l'était vraiment. Comme si c'était un "Nouvel Ordre Mondial". C'était en fait un club dirigé par des femmes spécialisées dans certains services que les hommes paient grassement. Cela pourrait être appelé prostitution selon ... Read full Story
Femboy 2021 2023-03-25 1,146 Teen (18+) Cumshot Big Cock gangbang Interracial Sex Toys gloryhole cum in mouth femination forcé poule mouillé Maitress bdsm poule mouillé
100%
A Perfect Pandemic: A Transsexual Transition in a Troubled Time
A Perfect Pandemic A Transsexual Transition in a Troubled Time A Novelette by Alexandra Rios Text Copyright Reserved © August, 2021 Dedication Transgender Day of Remembrance is a solemn occasion. I am offering “A Perfect Pandemic” for free as an antidote to the fear, phobia, discrimination, d... Read full Story
the greatest liar 2021-11-16 5,141 Teen (18+) Crossdresser Group Sex Big Tits Bareback Creampie Big Cock gangbang domination Guy Fucks Shemale Interracial double anal webcams
80%
Getting Fucked by Sasquatch
Bill was about to show up, I had known him from a chat room for years now. I was in his town for work and we had set up this date so we could finally meet each other. I heard a hard knock at the door and when I swung it open, I just stood there in awe. It wasn’t the big beard or really long hair tha... Read full Story
pennypenny 2020-08-21 5,978 Crossdresser Bareback Creampie Fetish Blowjob Big Cock redhead domination Guy Fucks Shemale pov Ass to Mouth cum in mouth
80%
Spankys mother cloths torn off on stage reveal she has cockoc
Erotic website remake of the little Rascals short film remake of Beginners Luck. The audience is laughing hysterically at Spanky attempts to open his stuck helmet. Spankys mother, a blonde beauty peeks out at the audience from the stage wing, as the crowd’s loud laughter, nervously biting her finge... Read full Story
kucksissylicktoman 2020-06-16 5,164 Big Tits Cumshot Masturbation Fetish Blowjob blonde Big Cock gangbang Lingerie Guy Fucks Shemale cum in mouth shemale + shemale
100%
The Next Level
Nitromethane It's been a couple of weeks now since I sucked my last shemale cock and swallowed her load, and with enough distractions, it hasn't been too difficult keeping myself preoccupied and my mind off of satiating my new fixation. Still though, I do have my moments when I sit back and imagi... Read full Story
Gwapo67 2022-02-01 5,758 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock gangbang domination cum in mouth
89%
Tgirl BBC slut Jill ravaged by 3 BB12"Cs at BBC nightclub
I'm a white whore blonde bubble butt Tgirl BBC fuck slut living in Las Vegas. I love it here because we get many big black studs who cum here to be serviced. I dance at a private unadvertized no-name shemale club off the strip which caters to big black studs only. I love the thrill of being on ... Read full Story
TgirlSlut4BBC 2015-02-15 16,736 tranny ass Big Cock gangbang high heels bbc
85%
Whores and Pimps - Part I
Malcolm was a middle manager in a small business in a large city. Malcolm led a pretty boring life; he in his forties, single, devoted to his work, he liked to keep himself fit, all of his family lived interstate except for his older sister who lived nearby, and he led a quiet social life. Malcolm h... Read full Story
shemale lover 2012-05-13 7,994 Stockings Crossdresser Cumshot Fetish oral sex pantyhose
91%
HOW MY AUNT AND SISSY NEPHEW CHANGED MY LIFE FOREVER! (fictional
It was the very first night of my month long North Carolina July summer vacation stay when my Aunt Meg suddenly entered the bedroom that I was temporarily sharing with my younger cousin Rudy. Being so openly effeminine in his body language,voice and looks, I had already planted such dirty thoughts ... Read full Story
CDDIXIE4U 2019-01-08 33,785 Teen (18+) Crossdresser Cumshot Masturbation Bareback Shemale Fucks Guy Fetish Blowjob Big Cock Ladyboy Lingerie domination Homemade Compilation cum in mouth shemale + shemale
100%
Lady In The House Ch. 02
A story by Michele Nylons, Part II "She's all yours Eddie. She looks beautiful." I heard Carmel say as 'she' disappeared down the corridor, her high heels clicking on the tiled floor. Eddie appeared at the door to the cell, he stepped inside and closed the door behind him. "So what do yo... Read full Story
✘Transensual✘ 2019-01-11 4,781 Stockings Crossdresser Fetish Big Cock Uniform Lingerie domination PRISON PUNK prison sex Prisonboycum Prison Bitch
85%
BANGING AROUND BANGKOK
BANGING AROUND BANGKOK: THE AMOROUS ADVENTURES OF CAITLIN "MEOW" MORRISON after living and working in Thailand/SE Asia for many years i decided to write an erotic story based on some of the people i have known, venues and places i have been, and the P4P night-scene where i spent way too much... Read full Story
bkkldby 2019-06-17 14,100 first time Teen (18+) Amateur Group Sex Big Tits Cumshot Outdoor Bareback Blowjob Big Cock Asian lesbian public place
100%
First fuck in public ;)
You’re only wearing a coat, I find a place where, I can kiss you then slide my hand between the flaps of your coat. I expose your breasts and slide my hand down across your tummy down to your pussy. My fingers start to explore your soft bush, working there way to your soft pink lips surrounding your... Read full Story
BalkanLoco91Ri 2019-08-26 3,826 Stockings Teen (18+) Amateur Big Tits Cumshot Outdoor Masturbation Bareback Creampie Blowjob Big Cock Uniform domination Homemade pov cum in mouth
50%
SOUS LA DIRECTION DE MAMAN
Jaime n'avait jamais eu beaucoup de chance avec les filles du lycée. C'était venu et reparti, et maintenant il en profitait un l'été dernier avant de partir à l'université avec sa virginité intacte. Ce n'était pas vraiment sa faute, il n'était pas un crétin ou un crétin, c'est juste que la vie et la... Read full Story
Femboy 2021 2023-01-26 1,465 Stockings Teen (18+) Crossdresser Cumshot Fetish Blowjob Big Cock Lingerie Shemale and Girl domination Guy Fucks Shemale Sex Toys cum in mouth
92%
Lady In The House Chapter. 01
A story by MicheleNylons ( Man in jail is transformed to prison slut.) How had it come to this? I was dressed as a woman and standing in the far corner of a darkened cell on E Block of Chelmsford Correction Facility for Men, and waiting for the most dangerous inmate in the jail. How had a mild... Read full Story
✘Transensual✘ 2019-01-11 9,431 Crossdresser Bareback Creampie Fetish blonde Big Cock Lingerie domination Guy Fucks Shemale transvestite slut PRISON FUCKBOY prison sex Prison Bitch
85%
My Awkward Phase
My Awkward Phase ©Alexandra Rios 2019 The greatest lie is that what happens in high school doesn't matter, because life begins in college. I pretended to agree, although I never believed it, for I was the world's greatest liar. Wannabees I was hanging out with my friends Quinn, Barb and Anne ... Read full Story
the greatest liar 2019-06-14 11,851 Small Tits anal sex Latina Masturbation Bareback Creampie Blowjob Big Cock transformation gangbang Shemale and Girl Guy Fucks Shemale Sex Toys Ass to Mouth cosplay hormones high school real life situations
65%
Marcia Goes Back to School
Marcia was painfully nervous. She hadn't been able to eat very much in days. The upside was she was even skinnier which would make Mistress and her husband very happy. She'd always been thin and on the diet Mistress Carol had her on she was already thinner than she dreamed possible. Her anxious stom... Read full Story
shemale lover 2012-12-19 10,579 Masturbation Blowjob blonde ass fucking big boobs
100%
I Give Up
The following story is the first of four parts of a tale that explores the theme of transformation. It is thematically similar others that I have submitted but has a larger narrative arc. I hope you enjoy reading the first portion, Act One & Two. I continue to work on better editing and someone h... Read full Story
ASSEaster5678 2018-09-14 9,091 Cumshot Bareback Shemale Fucks Guy Big Cock Ladyboy
100%
Karen, My School Teacher Part 5
The Bus Station By FoxyHosed I looked around, but no one was there. It was dark and pretty cold night outside. I felt the air blowing around and up my pantyhose encased legs and ass. Mmmm nice. I started walking to the bus stop a few blocks further down from the school. I felt very attractive g... Read full Story
FoxyHosed 2021-03-15 7,066 Crossdresser Cumshot Outdoor Masturbation Fetish Blowjob pantyhose legs pantyhose cd
66%
Samantha sissy TGTF
Theme and genre of the story: The genre is about gender bender, futanari, gay, physical transformations of the body, magic and biology, the kink in particular that must excite in the story is the perversion of the transformation of the body and mind through a magical element that manipulates biol... Read full Story
Samantha sissy world 2022-09-20 4,633 Teen (18+) Crossdresser Big Tits transformation transgender feminization pov sissification Cartoon magic Gender Bender
76%
Nylon teasers
They came into the video store where I worked as a clerk. Almost every day. Teasers. Both of them. What made it both great and terrible for me was that it fed my deepest fetish -- stockings -- as it denied me any fulfillment other than frequent and frantic "self-gratification."... Read full Story
shemale lover 2012-01-30 9,913 Stockings Big Tits fucking foot fetish
100%
Woman Cross Dresses for Power & Sex
Tucked in the far corner of a dark, dancehall parking lot, Sarah, also known as Robert, was having sex in a car with Joseph, also known as Josephine. Having sex in a car was no big deal. A lot of couples have sex in cars. Yet, if a passerby could see through the steamy windows, a sight to behold, ev... Read full Story
shemale lover 2012-10-09 3,978 sucking Fetish fingering crossdressing
25%
A Strange Romance
Although I was over qualified after I graduated and accepted a one as an Internet operations officer for one of the high street retailers. I was offered better jobs but I took the one with the retailers because it paid reasonably well and more importantly meant that I would have to relocate down to ... Read full Story
shemale lover 2012-07-05 6,885 Creampie Fetish crossdressing virginity
100%
Gemini Sluts and Gang
My good friend Renee and I had set up a double date gang bang for tonight now that she was finally out of the closet and ready. She has decided that life is too short to remain in the closet and miss out on all the fun. Renee and I have so much in common. Besides loving sex, we both have a fetish f... Read full Story
Regina10 2021-04-09 4,457 Group Sex Big Tits Cumshot Bareback Fetish Blowjob blonde gangbang Lingerie Guy Fucks Shemale Ass to Mouth cum in mouth
94%
Sissy Slut: Gang Favored
I confess I am a nymphomaniac shemale slut who loves being the object of a man’s desires. That's why I was out here with these hookers trying to hook up with somebody to have sex. I'm either having sex or I'm thinking about having sex most of the time I like being a honey. I love having sex with men... Read full Story
Regina10 2021-03-02 7,485 Stockings Big Tits Cumshot Bareback Fetish Blowjob Big Cock Ladyboy gangbang Guy Fucks Shemale cum in mouth double anal
87%
Southern Hospitality Ch. 03
XtinaSmith2017 Ash looked himself over in his bedroom mirror critically, finding himself oddly self-conscious about his looks. He had been texting Laura all throughout the day and they had agreed that dressing pretty casual would draw the least suspicion, so he had. He wore a simple patterned ... Read full Story
Gwapo67 2022-05-16 4,773 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Mature cum in mouth
50%
"SISSIFIED": 12 JOURS DE SISSY-MAS
JOUR 1: mardi 25 C'était le matin de Noël quand j'ai entendu frapper à ma porte, ce qui était, bien sûr, très étrange à dix heures du matin. À midi, j'allais chez ma famille pour Noël, et j'avais rarement des visiteurs inattendus. Toujours dans ma robe, je me dirigeai vers la porte et fus s... Read full Story
Femboy 2021 2023-01-20 1,308 Stockings Crossdresser Amateur Fetish Blowjob Big Cock Lingerie domination Sex Toys cum in mouth
33%
Growing up CD
Peter, Max and I played together like that for the rest of the weekend. We must have sucked each other's cocks at least 10 times over the three days. Peter and I were both physically drained. Max just seemed to be insatiable for our bodies. He didn't want us to go. He kept on saying how much he ... Read full Story
shemale lover 2011-12-04 4,197 sucking Fetish
92%
MY Party Favor Fantasy
My Party Favor Fantasy A fictional story built around an old fantasy of mine I ran a notice on one of those sex sites that said” Help me fulfill my fantasy and I bet we take care of some of yours also. Hi there, I am Penny and I am a total bottom trans w... Read full Story
pennypenny 2019-01-08 7,263 Stockings Crossdresser Group Sex Cumshot Masturbation Bareback Creampie Fetish threesome Blowjob Big Cock gangbang Lingerie redhead domination Guy Fucks Shemale Sex Toys Ass to Mouth cum in mouth double anal
100%
TO BE OR NOT TO BE – PART 2
TO BE OR NOT TO BE – PART 2 by Spanky de Bautumn Part 1. Sunny, Mel, and Shari learn they are going to New York to perform a play off Broadway and are really excited about it. Being a small troupe, we unseen members had to wear many hats. Unfortunately, there was just the two of us, Joe Donn... Read full Story
SpankydeBautumn 2021-02-22 3,639 Small Tits Crossdresser Cumshot Bareback Blowjob Big Cock Lingerie Guy Fucks Shemale Interracial cum in mouth
100%
SOUMISSION BBC DE SISSY
« Tyler ! Arrêtez-vous – vous regardez à nouveau, et il l'a remarqué ! » La voix de Jack chuchota d'une voix rauque à l'oreille de Tyler alors que l'eau chaude de la douche tambourinait dans son dos. Il ne restait plus que les trois sous la douche maintenant. L'entraînement de basket-ball était t... Read full Story
Femboy 2021 2023-01-24 1,438 Stockings Teen (18+) Crossdresser Fetish Blowjob Big Cock Lingerie domination Guy Fucks Shemale Interracial cum in mouth
88%
Becoming Lisa
From when I was as young as 9, smooth and long blonde hair, I was always dressing in my older sister's panties and bra, panty hose. My breasts were kinda girlish and i had long nipples that would get hard when I played with them. I was older now, but still only had a small 4 inch cock when it was ha... Read full Story
shemale lover 2013-08-09 13,041 Crossdresser Masturbation Fetish Lingerie kissing
100%
HypnoSissy Partie 2
DEVENIR CUM SLUT Une fois habillé et James parti, Rose demanda: "Vous êtes-vous amusé?" Je hochai la tête. "Oui, bien que je me sente un peu gay." Rose secoua la tête. "Brian," gay "est juste un mot, comme" lesbienne ", ou" faggot "ou" gouine ". J'ai mangé la chatte et demandé aux filles... Read full Story
Femboy 2021 2023-01-24 3,932 Stockings Teen (18+) Crossdresser Fetish Blowjob Big Cock Lingerie domination cum in mouth
100%
A Fairy Tale Part 2
=-=-Chapter Six-=-= I woke up sometime later and I was feeling better, even a little hungry actually, and I wanted a shower and I needed to pee and...I cocked my head as I heard the unmistakable sounds of Mistress Stacy's bed moving. She had a large one, king sized, with old springs or somethi... Read full Story
shemale lover 2011-12-06 6,733 Creampie Big Cock ass fucking
100%
The Day I Went SheCock Crazy
I summed up courage to meet up with my old shemale flame Fransicca (she is a Malaysian but living in indonesia) ... messaged her, she sounded excited and asked if i minded her friend joining us. 'Why not' i said. It was settled. we booked a villa for the next day. I checked in early. cleaned up ... Read full Story
Sara Banks 2021-04-26 6,572 Group Sex Cumshot Outdoor Bareback Shemale Fucks Guy Fetish Blowjob blonde Big Cock Asian Ladyboy gangbang
82%
Bikini Boy
I was the boy my father had hoped for after 3 daughters before me. Life in our suburban middle class two-story house was as normal as anyone else's. My dad was a loving father bringing me up and doing the things a father likes to do with his son – baseball, fishing, camping, working the garage... Read full Story
shemale lover 2012-06-12 15,427 Cumshot Fetish oral sex crossdressing
91%
Masturbation fantasies: Amanda, queen of the peep show
A guy visits a peep show with unexpected results. As he gets to watch a girl with something special, he discovers his hidden desires. This story contains: peep show – voyeur – gloryhole - fake tits – group masturbation – male masturbation – shemale – frottage - titfucking When William finall... Read full Story
ThatEroticWriter 2019-07-24 8,463 Big Tits Cumshot Masturbation Uniform Frottage
100%
Blushing Bride Chapter 6
Chapter Six: Wedding Presents I was on an incredible high for a couple of days after my wedding. Like many bridegrooms on the day, I had felt very nervous, both about the day itself and the years of married life that stretched out before me. Only, I had a little more to be nervous about than many... Read full Story
shemale lover 2012-07-21 4,090 Cumshot Fetish oral sex
72%
First Time Sissy Maid
I had been fantasizing for many years about serving a dominant Mistress, watching lots of movies online, and generally lusting over the doms I saw posting ads. At the age of 28 I finally found the courage to answer a rather intriguing post by an older woman and her trans partner who were looking for... Read full Story
shemale lover 2012-10-27 16,907 first time Fetish Big Cock domination sissy
84%
First Time: How I Love Cock
The first time I ever sucked a dick was when I was around 12 years old. I was at a sleep over with a friend. We were camped out in his backyard in a tent and he started things out tentatively by asking about my luck with the ladies, which was non-existent. Then he suggested that since neither of us ... Read full Story
wickeddogg 2019-12-11 33,765 Teen (18+) Cumshot Bareback Blowjob cum in mouth
100%
Sissy Slut and Stepdads part 2
My mother kicked Frankie out and swore that he was the last loser she would ever date. She believed that we were still having sex, and she was right. Pure raw animal lust drove us, and It was even better when we sneaked and got. That nervous adrenaline mixed with my passion and made me super horny a... Read full Story
Regina10 2021-02-15 4,097 Teen (18+) Crossdresser Big Tits Cumshot Masturbation Fetish Blowjob Big Cock Lingerie Guy Fucks Shemale Homemade Ass to Mouth
100%
A Game within a Game Part 1
Epilogue Rob came home from work. His wife Jenny was waiting for him. In her hands she held a letter. Jenny said: "We received this letter today. It is sad news from Marion S. We have met her and her husband John a few times - do you remember? John has had a car accident while driving fas... Read full Story
shemale lover 2012-03-05 14,197 Fetish bdsm crossdressing bisexual
96%
Family Frolic
FRIDAY My sister and her husband wanted to take a few weeks off in the sun and asked me to look after their kids for a while. I'd move out of my tiny apartment and into their house for the duration. As I was still living off my severance and they had a nice spread with an indoor pool and a h... Read full Story
shemale lover 2012-01-14 30,943 strapon porn
100%
Fender Bender
It was the first week of June and school was out for the summer, I was 18 and had just finished my Senior year. One night while we were eating dinner, My Mom and Step dad informed me that they were going away for a week. When they got married they did not go on a honeymoon so they wanted to take one... Read full Story
shemale lover 2012-07-26 8,376 Teen (18+) Fetish crossdressing
90%
On the Run
“Your first mistake was stealing hundreds of thousands of dollars from me. Your second mistake was thinking you could get away with it.” As I stood trembling before his desk, Mr. Atwater regarded me as if I were a bug on the windshield of his Lexus. “Do you have anything to say for... Read full Story
shemale lover 2012-09-01 11,293 Crossdresser Cumshot Blowjob jerking pantyhose
72%
ACROSS THE STREET AND TWO DOORS DOWN by Spanky de Bautumn
Jamie knew he was different. He didn’t fit in with the other boys, but he didn’t feel like he fit in with the girls either, he just knew he was different. He wasn’t into dolls or balls. He was the smallest boy in his class and more than half the girls outweighed him. But the one thing he had going f... Read full Story
SpankydeBautumn 2021-01-29 11,361 Teen (18+) Small Tits Crossdresser Fetish Blowjob Lingerie Guy Fucks Shemale cum in mouth
90%
Becoming a Drag Queen
I was thrilled when my boss told me he was sending me to San Francisco for a conference. It was a location on my "Top 10 places I wanted to go". I went online and Googled the major attractions and tourist "must sees in San Francisco. The conference was Wednesday to Friday and I figure... Read full Story
shemale lover 2012-03-01 13,929 first time sucking fuck domination
100%
An Invitation
"Oh come on,Sarah. There has to be a way." An innocuous enough statement, but that's how it all started. I'd just received an invite to Cressida's annual Christmas party which, maybe not on the Hollywood A list, was within the cognoscenti an occasion not to be missed. The soirees of ... Read full Story
shemale lover 2012-11-16 4,598 Fetish oral sissy
80%
The Farm
“See you Sunday, baby,” said Marcus Jenkins to his wife, Tasha. “Alright! Have a good day at work,” the wireless phone company retail store manager smiled. “Love you, Kobe! Love you, Tiara,” the wastewater plant operator said to his offspring. “Love you, too, daddy,” the youngsters rang out in un... Read full Story
Faggyboi and Puzziboi 2021-12-08 5,510 Teen (18+) gangbang Guy Fucks Shemale sissy femboy Ass to Mouth
80%
Aunt Cindy's Bizarre World Part 2
Chapter 7 I am guessing it was just over an hour until I heard the door open. It was her again, Miss Sindy Satin my auntie. This time she was wearing just an under bust white satin corset, long boots in satin exactly like mine but in white and her long, white bridal satin gloves and a the ribbon ... Read full Story
shemale lover 2011-12-02 7,956 taboo Fetish crossdressing sentimental erotic
71%
Cross romance
I wake up in the middle of the night. I have psyched myself into such a state that I just can't go back to sleep. Thinking back over the years, everything started with a size 32A bra. It happened on one morning when I just turned 13. In my locked bedroom, I clipped on a flimsy unpadded white cott... Read full Story
shemale lover 2012-02-04 6,765 Fetish crossdressing romance
100%
Sabbatical or Continuous Gang Bang?
My twin sister Laura had already left to go back to college this fall season, but I had decided to take off a semester as I was totally burnt out on school and needed a break. We were twins but not identical though we did look a lot alike and roughly the same size me being a few inches taller. My... Read full Story
shemale lover 2012-08-28 5,548 Crossdresser Cumshot Fetish Blowjob gangbang
100%
Exposure, Disclosure
The Greatest Liar, Exposure, Disclosure © Alexandra Rios 2019 Author’s Note: This is a continuation of the narrative which commenced with “My Awkward Phase”, which I posted here previously. Readers may wish to read that before continuing, although I have written them to stand alone. Natives s... Read full Story
the greatest liar 2019-06-18 7,611 Teen (18+) Small Tits Amateur Group Sex Latina Blowjob gangbang Guy Fucks Shemale cum in mouth
50%
A Perfect Life
The reasons I am not writing this myself. I have finally convinced someone to do it for me. She promised to post it on the Internet, but only as fiction. I suppose it is a bit unbelievable. It all started with the best of intentions. I had married my love while we were still in college. She... Read full Story
shemale lover 2012-05-05 12,572 transgender
60%
Brotherly Love, Sisterly Love Chapter 2
"RACHEL" My twin sister, and sometime brother, and I had been experimenting sexually with each other and crossdressing together for around a month, growing to love and to perfect our new feminine personas until they became the ones we thought of as our true selves. Whenever our parents ... Read full Story
shemale lover 2012-09-28 6,570 Cumshot Fetish oral sex cum swallowing
90%
Camming Down the Rabbit Hole Ch. 08
A familiar sensation greeted me as my eyes opened and a yawn escaped my mouth, that oh so delicious feeling of my morning wood straining against my silk night ware. It was becoming an ever occurring pattern that no matter how large the orgasm the night before I would wake with the hardest of cocks, ... Read full Story
Dani_does_Dallas 2021-11-15 3,887 Stockings Small Tits Crossdresser Amateur Cumshot Masturbation Fetish Uniform Lingerie Homemade self sucking pov cum in mouth
71%
Filthy Little Beast
I had very few memories of my early childhood. The ones I did have were anything but pleasant. I did remember my mother and her blind hatred of my father and myself. She was very tall blonde woman with cold blue eyes named Monica. My mother always dressed in the most expensive leathers and satins in... Read full Story
shemale lover 2011-12-02 12,474 taboo Fetish crossdressing erotic encounters
95%
A Helping Hand
It was late on a Friday night when I heard my parents arguing. It always happened whenever they were getting ready to throw a big party. My mother played the role of party planner and handled all of the details, but between caterers, musicians, and the other help something always went haywire. My fa... Read full Story
shemale lover 2012-03-09 14,890 Fetish bdsm transformation