Stepsisters: A Little Naughty Cohabitation

A story-driven romance and life simulation game in which the protagonist begins living with Karon, who becomes his step-sister following their parents' remarriage. What starts as innocent family affection gradually deepens into romantic attraction as the two share daily life under one roof. The game blends slice-of-life gameplay with adult content, featuring time management (morning, afternoon, night), stamina and energy systems, job mechanics for earning money, communication and gift-giving to raise affection, and intimacy progression. Karon's behavior, clothing, and receptiveness change based on time of day, affection level, and arousal state. Gameplay focuses on balancing work, exercise, dating, and intimate encounters to deepen the relationship while managing resources and the character's physical condition.