After losing her mother, high-schooler Sumire faces eviction and turns to a "Free Friends" hookup site for fast money. Her first encounter is with a mysterious man who pays generously for her virginity. The passionate night leaves her craving more, but the next day at school she discovers the shocking truth: her client is Kaito, her estranged older brother who has returned as a trainee teacher.

Unable to resist the forbidden attraction, they begin a secret, twisted relationship. Under one roof, their encounters grow bolder — in the school toilet, empty classrooms, and even at home while she pretends to sleep. Sumire's tsundere personality cracks as shame mixes with overwhelming ecstasy. As their immoral bond deepens, the risk of exposure rises, especially with her friend Miki's involvement and the emotional chaos it brings to their fractured family ties.

This PoRO hentai OVA explores the dark thrill of incest, financial desperation, and addictive pleasure in a 4-episode series packed with intense creampie scenes, public risk, and emotional corruption.

Based on the erotic game by Noesis.