Old man Ebiwara is called out by Nana in the park. He is worried because she looks like she could die at any moment. The two become good friends and start spending time at Ebiwara's house after school. Ebiwara, who is unemployed, wants to continue their relationship so he borrows money to entertain Nana. One day, a debt collector comes to Ebiwara to collect the debt and Nana proposes that he pay it off with her body!