Old man Ebihara is called out to Nana in the park. She was worried because she looked like she was about to die. 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 Ebihara and proposes that Nana repay her with her body!
