13화: 카스가가 나카무라의 일기를 발견하고 현재 상황을 탈출하기 위해 상호 계약을 제안한다.

13

Kasuga enters into Nakamura's room. He finds her diary and starts reading it. He recalls what happened. Nakamura comes back, seizes the diary and runs away. He follows her and this time catches up to her. This time, he asks her to make a contract with him: they'll do what they can in order to leave for good someday. (Source: Wikipedia)