Sana, Nanaka, and Aoi are depressed due to Syuri and Syusuke leaving, and decide to go to the river to take their minds away from the subject. However, Aoi fakes being ill to allow Sana and Nanaka to be together. After a failed attempt at fishing, Sana takes Nanaka to a cave that he and Syusuke considered their secret hideaway. After it starts to rain outside, the two stay in the cave, where Sana asks Nanaka why she did not send the notes in the mailbox directly to Sana. Nanaka reveals that she was afraid that the Sana she knew and loved was gone. The following morning, as Nanaka walks outside, she recalls what occurred in the fire in her youth and screams in pain.
沈みがちな菜々香達の気持ちを引き立てようと、佐菜は以前、みんなで遊びに行った小槌川に行こうと企画する。だが、当日の朝、準備を整え、出発しようとした矢先、佐菜のところへ麻緒衣から電話が掛かってきて……。
Sana, Nanaka y Aoi están deprimidos debido a que Syuri y Syusuke se fueron, y deciden ir al río para distraerse del tema. Sin embargo, Aoi finge estar enferma para permitir que Sana y Nanaka estén juntos. Después de un intento fallido de pescar, Sana lleva a Nanaka a una cueva que él y Syusuke consideraban su escondite secreto.
