Sana mulls over Nanaka's reaction, and is elected the classroom representative along with Nanaka when Syusuke refused to be the classroom representative for another year. Nanaka still acts coldly towards Sana, leaving him lost in the library. When he returns to the classroom with the aid of Asami Hoshino, she looks jealously at him and Asami. Later, Sana and Nanaka coincidentally go to the music room, where Nanaka, sequestered in the teacher's office, overhears Sana playing the song she played to him on her violin the day he left. Touched, she says hello to him the following morning.
5年ぶりに会った友人たちに懐かしさを感じながらも、さまざまな変化に驚きを隠せない佐菜は、戸惑いながらも日々学校生活を送っていた。そんな中、ホームルーム中に同じクラスの朱里と修輔の推薦で、佐菜は菜々香と一緒にクラス委員に任命されてしまう。5年前とは人が変わってしまったように近づきづらくなった菜々香の態度に思い迷う佐菜だったが、別の組のクラス委員星野あさみに優しく声をかけられて…。
