Oke ga Ochiru Toki

At school the next morning, Kazuma, Ibuki, Ui and Daigo, in preparation for finals, arrange a study group at the inn. After five and a half hours of studying, the group takes a break to bathe and watch the fireflies. The scene reminds Ui of when she was very young and Hajime announced that he was getting married which did not go over well with her. After dinner, the group turns in for the night and Kazuma bumps into Ui on his way back from the bathroom.