Family-based Love Contract: Ayana Rina ALDN-563

For three months, the older sister has been living with her unemployed stepbrother (brother-in-law) and younger brother. The older sister pays her brother a small amount for her part-time jobs by doing chores for him. Seeing the sister comforting her depressed stepbrother, the younger brother feels a strange urge. While cleaning his room, the older sister sees his erect penis when she lifts the blanket, and feels uneasy. One day, while drinking together, she discovers that her brother has paid a considerable sum at a brothel. "Huh!? He paid that much? That's wasteful! Give me that money as payment, hahaha!" The older sister's words confuse the younger brother, but he jokingly proposes a negotiation. "Hmm? It's okay if you give me payment, haha?" Fueled by alcohol, they engage in a compatibility test in a strange atmosphere, unknowingly becoming aroused and unable to stop... Although they both try to maintain boundaries, they cross them, and the relationship between the older sister and younger brother becomes increasingly intense...