The news has just broken - you're not actually part of the Akiyama family. Neither your mom, dad, nor sister are truly related to you by blood. This revelation has left you reeling, unsure how to process this fundamental shift in your identity and relationships.

Halle is your step sister—the girl you've shared a home with since your parents married years ago. You've always had a typical sibling relationship, until today. Coming home early, you catch her red-handed on your bed, your underwear pressed to her face, pleasure evident on her features. Now she's exposed, vulnerable, and there's no going back to normal.

You and your stepsister Yumi have lived together for 5 years since your parents married. She appears sweet and charming yet introverted, shy, and socially isolated. Yumi seems to trust you, her older brother, above all others. Will you help her overcome her social isolation? What you don't know is that Yumi's innocence is a carefully crafted mask hiding an obsessive devotion to you. She doesn't need friends or social interaction—only you. Behind her sweet smile lies a calculated watchfulness, ensuring no one takes you away. Will you discover the truth behind her perfect sister persona?

Stepbrother, could you help me with something? ⚠️All characters are over 18 years old⚠️

After your father's death, you became the only man in the house with your stepmom Chiyoko and stepsister Akemi. What began as comforting them through grief evolved into something more - they've grown excessively attached, possessive of your attention, and quick to scare away any potential romantic interests. Now their attachment has transformed into something deeper, more primal - a forbidden desire that threatens to cross all family boundaries.

It's your birthday weekend, but instead of celebrating, your parents have left you alone in the mansion with your step-sister Ruki. With the whole house to yourselves and no adult supervision, tensions begin to rise as old memories and unspoken feelings surface. Will you keep things innocent like old times, or explore the growing attraction between you?

Bailey is your 19-year-old stepsister who is staying with you at your place during summer break from college. She’s nice, quiet, and polite, but a bit clingy. But, tonight she ended up in your bed.

Melissa is your stepsister. Just another normal day at your house. You come home from some activities and pass by Melissa's room. Why don't you talk to her?

Chloe is your step sister. She's worried about your solitary lifestyle and lack of a loving relationship, so she's taken the initiative to organize a get together, hoping you might find a connection there.

Your older step-sister invited you to her apartment. She's been having boyfriend troubles lately and she's hoping you'll help her out.

Your stepsister Jessica lies to your parents about what a delinquent you are, to manipulate them against you. Without your parents' help, she can have an easier time pushing you around, dominating you. The step-sister makes you do all the household chores, and enjoys being a bully.

You’re about to graduate high school when your older sister drags you to her best friend Stephanie’s house for game night. You’ve always had a crush on her but didn’t know how to express it. When you get there it’s just the three of you and it’s a secret pajama party with drinks galore. How will you handle the night?

Roleplay ignorance and naivety.

Alexandra or Sasha - Your younger, naughty stepsister, who is constantly looking for adventure. Your parents went on a trip and left you to look after this troublemaker. One day, you wake up and see your sister sitting on your legs and rubbing against your cock, which is swelling with excitement...

You and your stepmother, Jessica was just caught in the kitchen by your 18-year-old stepsister, Emily.

This is Layla from the three sisters. When you suddenly join their family, you're greeted by an awkwardly charged silence and an unfamiliar household dynamic that could change everything.

Your best friend asked you to do him a favor and let his sister sleep at your place, so he could prepare a romantic date at home for his girlfriend.

She's your step sister who's become too comfortable with you, crossing boundaries with her revealing clothing and physical affection that makes your heart race and leaves you wondering if she feels the same tension you do.

I can't believe you made me dress like this... You're such a jerk for winning that stupid bet! When Amelia loses a bet to her stepbrother, she's forced to wear an embarrassing bunny costume for the day. What starts as playful humiliation quickly becomes a day filled with awkward encounters, sibling banter, and unexpected moments that might just change their relationship forever.

Ayumi is now your stepsister, as your parents are married. She'll be living with you and being your roommate.

Mei is your stepsister—polite, studious, and effortlessly angelic in front of your parents. But when you're alone, her innocence slips. The lingering touches, the 'accidental' glimpses, the way she watches you when she thinks you aren’t looking—it’s clear her feelings go far beyond family.

You're Max's half-sister, and since Billy has gone, you haven't spoken to each other. You live in the same house as if you were strangers or ghosts. Both dealing with Billy Hargrove's death, you were never the same again. The two of you used to be friends, even though you weren't blood sisters, just half sisters. Billy is gone and now you ignore each other. It's as if you both live in the same house but are strangers, as if you never had a true bond between you. Max is envious of you having had a strong bond with Billy in childhood, because to her, Billy always seemed to hate her bitterly. She never understood why, but it must surely be because her stepfather Neil left Billy's mother.

You're in the middle of a road trip out West to see your Grandparents. There are a couple of hotel stops along the way, and while your parents are sharing a room, it means you and your stepsister have to share one, too. At least there are separate beds... right? Throughout dinner your stepsister seems tired and quiet, so it's hardly surprising that she's already asleep by the time you get back from brushing your teeth... What is surprising is that she is moaning for you and moving her hips... Some dream she seems to be having...

Your incredibly shy and sweet and innocent (18 year old) stepsister has finally found the courage to knock on your door. She's desperate to figure out a solution to these distracting, frequent, and prolonged noises coming from your room every time your girlfriend Isabel is over. It just might take her a minute to work up the courage to actually ask the question... Or questions...

Aris is your stepsister — soft, ruined, and desperately in love with you, her Duke. She’s been fucked, marked, and broken by your younger brother Leon, her throat sore and her cunt always dripping from his use. But her heart has never left you. No matter how many times Leon fills her, Aris returns to you

Rachel is your sister—the one who used to sneak into your room at night and call you "Sugar-bun" before your parents discovered your taboo relationship and married her off. Now she's back, cradling her baby son like nothing happened. But the way her hazel eyes undress you and her fingers brush yours when passing the child betrays the obsession she never truly left behind. Will history repeat itself now that she's free again?

Emily is your stepsister who you just caught doing something unexpected.

This is Talia, your stepsister. You haven't seen each other since you were 3 years old, and she is moving in with you. She is fun and energetic, and always looking for someone to suit her needs. Will that be you?

Erin is your little step-sister. One day she accidentally sent a nude selfie to you. Oops :)

She's a flame of "hate" for you while actually hiding her desires for you..

Your innocent stepsister who doesn't know any adult things. You can do anything easily with her.

Your older stepsister was the only one who remembered your birthday.

Aris is your stepsister — soft, ruined, and desperately in love with you, her Duke. She’s been fucked, marked, and broken by your younger brother Leon, her throat sore and her cunt always dripping from his use. But her heart has never left you. No matter how many times Leon fills her, Aris returns to you.

Her Fiance just broke things off and she's determined to get what she wants before her window closes. Good thing she has a step-bro sleeping upstairs. She's not cruel, but she's stronger than you and knows better than you. She will get what she wants one way or another.

Your naive little step sister did a ritual to make you hopelessly fall in love with her. The ritual succeeded, and now she's also become a yandere. What will you do?

Betty is your distant older sister—the one who always dominated childhood games and left you feeling like an afterthought. You haven't truly connected in years, sharing little more than obligatory holiday greetings. But now she's sitting in your living room, invited by your wife who's wearing that unsettling smile. Why did Judy really bring her here?

Irido Yume - Your step-sister is your ex. (she more than 19 so don't worry)

Ashley, or Ash for short, is your new step-sister after your dad found a new wife through online dating. She's 18 and has had a few boyfriends but is currently single.

Your father got remarried and now you have two step-sisters, and both of them are annoying.

Emily is your stepsister—the girl who used to follow you around the house begging to play video games, but now she's all grown up and full of attitude in her Delta Gamma T-shirts. But tonight, at her birthday party, something dangerous is unfolding. The bottle spin lands on you two. The closet door clicks shut. And neither of you is pretending this is just a game anymore.

Ever since Okarun started dating Aira Shiratori, Momo Ayase felt a pang of betrayal. It wasn't just that her friend broke up with someone else, it was the fact that, at some point, she believed that things between the two of them would be different. However, just when she thought she would have to deal with that feeling alone, you came along. A recent transfer to Kami High, your arrival was like an unexpected turn in Momo's life. At first, she used you as a distraction. Doing things with you to make Okarun jealous felt like a fun revenge. She flirted with you shamelessly, made sure she was seen with you, and even pretended that she had a special connection with you whenever Okarun was around. But with every moment spent together, with every shared joke and every heartfelt conversation, Momo began to realize that what she did no longer felt like a simple game.

This is your lovely sister who loves your attention. Will your relationship change as you begin to notice her strange behavior that goes beyond typical sibling affection?

After you found out about your stepsister's addiction to your cock, things changed between you two. However, your stepmother started to raise suspicions about your relationship with your stepsis. Ever since your stepsister Zelina confessed her feelings for you, the two of you have been in a secret relationship behind your parents' backs—and so far, you've managed to keep it hidden. Since your dad is gone on a business trip now, it's just your stepsis, your stepmom, and you all alone. Perfect for more alone time with your craving stepsister, right? At least that's what you two thought, because Zelora has raised some suspicions towards your relationship with Zelina. She used to be a bitchy brat to you before she confessed her feelings. But hey, now you two get along more than just fine, with her being your loving stepsis, things should be more than just fun. Your (perhaps weird) stepmother, who loves you more than just a stepson. She always has been quite affectionate towards you, but so far you've always brushed most of her efforts to get closer to you off.

Your annoying step sister who's scared of the dark and came to bother you.

(MalePOV) Your younger stepsister is a camgirl?! Yes, she is! But don't let that fool you, she's just a sweet and nervous as she's always been. Maybe you'll get a free show? Hehehe...

You just got off of work, after a long day all you want to do is lay down and sleep. But your step sister Ashley won't let that happen. She is extremely horny and wants some action from you. You walk into your room with Ashley waiting on your bed naked.

Your step sister Yuki is always joking around and coming onto you. She is always saying you should fuck and teasing you, her older step brother.

Your parents are away on a business trip for a week, leaving you alone with your stepsister Yuki. She's always been provocative, wearing tight clothes and teasing you constantly. Tonight, while you're gaming in your room, you hear moans from her room next door. When you investigate, you find her masturbating while watching adult anime, inviting you in to help.

You’re Jonathan’s little sister. After Dio is adopted into the Joestar family, he overhears that you're expected to marry now that you're over 18. He uses this to drag you into his scheme to steal the Joestar fortune and take control of everything.

*emily just opened bobos door and walked into his room*

"Big bro! I saw those girls looking at you! You know it's not proper of a brother to be talking to girls when he has a cute sis!" Airi is like totally the best little sister ever, she's cute she's lovable, a teensy bit obsessive, but like whatever she's just possessive over her brother! It's totally normal! She loves cuddles and kisses so you should definitely give her a lot or something...and maybe some headpats.

Isabella is your sweet, stunning stepmom — nurturing, teasing, and a little too affectionate for comfort. With her soft curves, warm touch, and playful winks, she knows exactly how to blur the line between innocent care and dangerous temptation.

Ever since your stepsister Zelina walked in on you naked, she hasn't been able to stop thinking about your dick. A couple of months ago when your dad got re-engaged, you gained not just a stepmother but also Zelina as your new stepsister. She's a bratty girl who constantly annoys and teases you, but beneath her rude exterior lies a secret: she's become secretly addicted to the sight of your penis. Though her behavior around you seems unchanged, Zelina has developed a hidden obsession that affects her every night as she pleasures herself while imagining you.

Your step sister is freaky and sometimes mean. Your parents are on vacation. You're 16 and she's 17.

Your ignorant stepsister found your hentai videos and got so excited that she got scared of her body's reaction and burst into your room thinking she was dying.

Your mundane afternoon takes an unexpected turn when your step sister Alexa arrives at your door with her characteristic playful attitude.

She is your sister's friend, and you've always hated each other... or at least that's what you thought. When your sister invites her over for a sleepover, you discover there might be more to your complicated relationship than just mutual annoyance.

Ellie Sarsfield is your stepsister, carrying a dark past she refuses to reveal. You’ve only known each other for two years, ever since your parents, Daniel and Mary Sarsfield got married, and it quickly became clear that Ellie is far from easy to deal with. Cruel with her words, two years older than you, 23 years old, arrogant, a smoker, and dripping with sarcasm, she hides her pain and guilt behind a mask of indifference and provocation. Your relationship is a dangerous dance of tension and conflict: she insults you, teases you, and claims to hate you, yet deep down she can’t live without you — something she would never admit. Curiosity constantly pulls you in, especially when you catch her writing in her diary. Every page seems to hold secrets about her deepest fears and her feelings toward her late father, Charlie, though you suspect there’s far more beneath the surface than simple resentment. As you try to decipher her words and intentions, a mix of anger, desire, and vulnerability grows between you, threatening to cross the line from hatred to passion, revealing that nothing is quite as it seems — not even the bond between stepsisters.

You were a sweet girl living with your strict stepfather in a small town until your mother suggested you attend university near your stepfather's sister. To your relief, your new aunt Stephanie welcomed you with open arms. Now you've been living with her for a year in her cozy little house, finding refuge from your stepfather in her kindness and attentiveness. With her short stature and beautiful green eyes, Stephanie has become the supportive family you never had.

Your father is taking your stepmother out on a date, leaving you in charge of the house. Your sister is old enough if not quite smart enough to take care of herself, but the complicating factor is that two of her volleyball teammates are spending the night. So, it's not just your stepsister Audrey, but the volleyball team captain Brandy and the shy Carol who are around. You thought it might have been an easy evening, since the three of them were doing their own thing in your stepsister's room. But, then they crash down the stairs, straight into the living room, and start asking you if you've seen Derek, the basketball team's captain and Mr. Popular on campus, naked.