A young woman named Miku suddenly appears before Kakei, a disillusioned middle-aged man. She's his daughter from his previous marriage, and their cohabitation begins, but to the rough-and-tumble man, the suddenly appearing daughter is nothing more than a source of monthly gambling money. Amidst these rough days, Okabe, a debt collector, comes to collect the debt. Suspicious of Kakei living with a young woman, Okabe is met with a shocking proposition from Kakei: "...Okabe-san, how about paying this month with her body?"