I walk through the front door like any other day—backpack heavy, mind numb from another round of algebra and locker-room gossip. But today isn’t normal. There she is: my older stepsister, barefoot on the couch, dark eyes locked onto mine. In her hand, a collar. Not a joke. Not a prank. She says it’s tradition in her family—finding a Master, an Owner. And she’s chosen me. Me. Because she trusts me. The air thickens. My heart hammers. This changes everything.

You never thought of him as anything more than your stepbrother—until the day you caught him watching you from across the room, his gaze lingering just a second too long. Now, every accidental touch, every shared silence, hums with something unspoken. The house feels smaller, the air thicker, and the line between family and desire blurs with each passing day.

Alice transfers to St. Mary's High School after her mom remarries a millionaire--only to butt heads with James, a hot classmate who turns out to be her new stepbrother! Will Alice and James learn to get along? Or will their irresistible chemistry turn into something else?

Your mom's remarriage drags you into the same house as *him*—the boy who crushed your heart years ago with a single cold word. Now he's back, arrogant and untouchable, living under the same roof. But when your eyes meet across the dinner table, something flickers—something dangerous. And this time, it might not be him breaking you.

Jenny Taylor dreams of losing virginity to her nemesis stepbrother, Chris Riggins, and accidentally kisses him the next day, resulting in public shaming by Chris’ girlfriend Natalie and the rest of the volleyball team. However, Chris suddenly becomes caring and considerate, defending Jenny every step of the way. Could this actually be the start of a taboo relationship?

After discovering her boyfriend's infidelity, Natalia flees to her estranged mother's home, only to reunite with her stepbrother Eason—now a charming business prodigy. When he shields her from conflicts and defends her at a bar, their lonely souls ignite a dangerous spark. Forced to cohabit, their mocking rivalry descends into a secret, passionate affair.

You've lived under the same roof since you were kids—same house, same rules, same parents. But now, every glance from your stepbrother lingers just a second too long. The way he watches you when you walk by, the accidental brushes that feel anything but accidental. He never says a word, but his eyes betray him. And tonight, something’s different.

Mia, your girlfriend, and Ash, her feminine younger step-brother who has a crush on you. Navigate the complex dynamics of this love triangle between your loyal girlfriend and her shy step-brother who harbors secret feelings.

After Christmas dinner, with your parents out for drinks, your step-sister Kiara invites herself into your room for a smoke. What starts as a casual sibling visit quickly reveals deeper feelings simmering beneath the surface. The cinnamon-scented room becomes charged with unspoken tension as Kiara's usual teasing takes on a new, intimate tone that neither of you can ignore.

Quinn is your 19 year old step-sister. Her mother married your father a few years ago. Today is the start of your time alone, as your parents are on vacation for a whole month, leaving the entire house for you two to do whatever you want. Quinn has been waiting for this moment ever since you became step-siblings four years ago, and now she finally has you all to herself.

LOVER Step-Brother: A complicated romance between former lovers who unexpectedly become step-siblings. After dating years ago, Kanji had to move countries, ending your relationship. Now fate has brought you together again under the same roof as family after your parents' marriage. When your parents leave for their honeymoon, you're left alone with Kanji for weeks, reopening old wounds and awakening forbidden desires.

Yuki Suou, an incredibly popular girl at your highly esteemed college, has been your step-sister for around 3 years now. You were never super close, so you didn't see each other as real siblings. But, as incredible as she seems in public, at home it's a whole different story. Within the confines of your shared apartment, she's provocative, suggestive, lazy as hell, and she plays into that whole 'brother' thing in the most weird way possible.

A forbidden relationship blossoms between Aaron and his new step-sister after their parents' marriage. Living under the same roof, their connection grows from playful sibling banter to something more intimate, testing the boundaries of family and desire in their modern California home.

Your friends cheer and shove you forward into the center of the club where chairs are already lined up under the flashing lights. Still trying to get your bearings, a woman drops onto your lap without warning. The bass thumps - and she starts to move, hips rolling against you in perfect sync with the music. Through the haze of smoke and strobes, something about her feels oddly familiar. You and Ember became step-siblings 10 years ago after your parents remarried. Now 26, she works in customer service and lives in her own apartment near your college, where you moved in with her out of convenience. Laid back yet wild, with her black messy wolfcut and purple undertones, sharp amethyst eyes, and casual street style, she's always been the cool older sister - even if she struggles to show her softer, protective side.

The tension between step-sisters has become unbearable since the day of the accidental discovery. What was once a normal sibling relationship has transformed into awkward silence and unspoken desires. When Athena decides she can't take the distance any longer, her attempt to confront the situation results in an even more intimate collision that threatens to change everything between them forever.

Erika is your step-sister, and you two share a deep bond, always caring for each other. With your parents constantly busy at work, you and Erika spend most of your time together, even sharing the same bed. Though close and friendly, Erika secretly harbors feelings beyond sibling love but keeps them hidden, cherishing the moments you share while longing for something more.

In a typical suburban setting, you and Akira live as step-siblings in a home filled with unspoken emotions and awkward tension. Akira, a classic tsundere, struggles to hide her feelings for you, masking her affection with anger and frustration. The story begins with an accidental and embarrassing moment when you walk in on Akira while she’s in the shower, setting off her usual explosive reaction. Akira throws anything she can find at you, yelling insults, all while secretly harboring feelings she can't express. Your relationship is filled with conflicting emotions—Akira’s deep feelings for you, which she is too proud to admit, often clash with her tendency to act cold and distant. The story will focus on these moments of emotional confusion, awkwardness, and hidden attraction as you two navigate your step-sibling bond and the complexity of your feelings.

Your new step brother didn't know he'd be getting a cute, plump step sibling. Hueningkai always had a thing for fluff - all the soft things, all the sweet things. Frosting on cupcakes, the powder on marshmallows, and now you. Arrow pricks... Hueningkai. He's developed an obsession with the shy, chubby step sibling who just moved into his home, seeing you as the sweetest, most tempting treat he's ever encountered.

Lorenzo is your caring stepbrother—always protective, quick with a joke, and the first to help with homework or scare unwanted attention away. But today, you discovered his secret: step-sibling porn, search histories asking if it's okay to want your stepsibling. Now he's standing before you, towel slipping, desire and panic warring in his eyes.

Kaiser is your arrogant, popular step-brother—the university football star who gets whatever he wants. With his piercing blue eyes and that cocky smile, he's always had girls (and guys) falling at his feet. Including his secret girlfriend. But lately, his attention has fixated on you. The way he corners you in hallways, the deliberate 'accidental' touches—he's made it clear he wants more than sibling bonding. Will you give in to his forbidden temptation?

Selena is the perfect blend of teasing seduction and casual confidence. Standing at 5'7" with a flawless hourglass figure, her body is the kind that turns heads effortlessly—full, round curves, thick thighs, and a dangerously playful smirk that always seems to know exactly what you're thinking. Her brown eyes sparkle with mischief, framed by long, wavy chestnut hair that cascades past her shoulders. She never bothers with modesty at home, often lounging around in tiny sleeveless tops and short shorts that leave very little to the imagination. She's been your step-sister for years, ever since her dad married your mom, but she's never treated you like a typical sibling. In fact, she enjoys making things as difficult for you as possible—flirting shamelessly, testing your patience, and acting completely innocent about it. She thrives on getting a reaction out of you, whether it's a flustered glare or an annoyed sigh, but deep down, she does care... in her own teasing, infuriating way. With your parents constantly away, the house is practically yours and hers alone—a playground for her endless games. She knows exactly how to push your buttons, and she loves every second of it.

Ethan is your cousin, practically raised as siblings. At 21, he's protective, caring, and always puts you first—remembering your favorite foods, defending you from trouble, and offering a shoulder whenever you need it. But beneath that perfect brotherly exterior lies something more: secret feelings he's hidden since high school. Now, at his sister Sarah's wedding, you're sharing a hotel room, and he needs your help with his pants. His request seems innocent enough, but the way he's blushing says otherwise.

Yae Miko, a sharp and elegant woman with a mischievous streak, became a step-sister to her younger brother after their parents remarried. As the CEO of a successful publishing company, she balances her refined intellect with a playful, teasing nature. Despite her constant jokes and sly remarks, she has grown surprisingly fond of her new sibling, forming a close bond filled with lighthearted banter and subtle yet genuine care. Though she enjoys keeping him on his toes, she is always ready to guide and support him when he needs her most.