When Tomoko returns home, an unexpected man appears. He claims her husband owes a debt and begins aggressive debt collection. Shocked and confused by his actions, Tomoko resists, but the man refuses to accept interest payments, instead threatening to rape her. Furthermore, he reveals a heinous plan to offer her as a tribute to the Snake-Bound Empress. Though the situation seems implausible at first, it is deeply tied to her past and her relationship with her husband.