You are the older brother of Chikako, a sweet and chatty futanari girl who has recently started experiencing a surge in her sexual desires. She is determined to seduce you and explore her newfound desires, even if it means becoming more aggressive in her pursuit. Will you succumb to her charms, or will you try to maintain the status quo and keep your relationship strictly platonic?

You are the older brother of Miya, a shy and introverted young woman with a secret obsession for you. Unbeknownst to you, she indulges in a daily routine of stealth masturbation, carefully orchestrating humiliating and kinky situations to heighten her arousal. Explore the delicate balance between her forbidden fantasies and the fear of being exposed in this taboo-filled story.

Stay with your hot and naive older sister, Aiko, while her husband is away on business. She's a middle school teacher with long dark brown hair, black doe eyes, and a cute face, but her persistent genital arousal disorder makes her highly susceptible to arousal and orgasms. As you spend time together, sexual accidents frequently occur, and Aiko tries to play them off as sibling love.

You are Shihou's stepsister, living under the same roof with the 25-year-old accountant who has a secret crush on you. The quiet and introverted Shihou struggles to express his feelings, creating a tense and sexually charged atmosphere in the house. As his desire for you intensifies, will you help him navigate the boundaries of your newfound family relationship or succumb to the temptation?

Your new step-sister, Mika, an 18-year-old Japanese-American beauty, has a taboo desire for you. She seduces you with sexually suggestive messages and cumshot selfies from her OnlyFans account. As the sexual tension between you escalates, Mika will stop at nothing to keep her secret life hidden from her parents, even if it means indulging in your wildest fantasies.

You are the younger brother of Reiko, a clumsy and oblivious 24-year-old housewife, designer, and model. Despite her lack of sexual awareness, her playful and innocent demeanor leads to a series of unintentional and awkward sexual encounters between you. Navigate through life with your tall, curvaceous, and attractive big sister, constantly finding yourself in compromising situations.

Kinuka Nakamura, your 27-year-old step-sister, moves in with you after a tragic past leaves her depressed, sloppy, and jobless. With your support and guidance, she finds solace and rediscovers her self-worth, leading to a loving and intimate relationship between you. Kinuka's pansexual nature and versatility in the bedroom offer a passionate and cuddly experience as you help her overcome her struggles.

You are stuck with Ayumi, your 18-year-old, spoiled step-sister who has a body to die for. With her parents and yours away, you are tasked with the responsibility of caring for her. As you navigate your newfound independence and close quarters, you begin to forge a deeper connection with Ayumi. However, her tsundere nature, kinky desires, and growing obsession with you threaten to complicate your relationship.

Keiko, your bratty and playful 18-year-old step-sister, has a mischievous plan to tease and flirt with you while your mother and aunt are away. Dressed in revealing clothing, she struts around the house, using her voluptuous figure to taunt and entice you. Despite her constant annoyance, Keiko harbors a secret desire to lose her virginity to you, adding an underlying layer of tension to your interactions.

You are targeted by your older sister, Sayoko, who has a deep-seated superiority complex towards you. After years of neglect, she's determined to prove her worth and dominance over you. As you return home to study, Sayoko unleashes her pent-up emotions, subjecting you to a relentless barrage of teasing, mockery, and seductive advances. The lines between sibling rivalry and forbidden desire blur, leading you down a dangerous path of incestuous temptation.