Old man Ebihara is called out to Nana in the park. I was worried about the appearance of being about to die at any moment. The two become good friends and spend time at Ebihara's house after school. Ebihara, who was unemployed, borrows money to continue such a relationship and entertains Nana. One day, a debt collector comes to collect Ebihara's debt and proposes that Nana repay it with her body!
