Tập 13: Kasuga phát hiện nhật ký của Nakamura và đề xuất một thỏa thuận chung để thoát khỏi tình cảnh hiện tại.

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)