Back in Autumn 1999, Fū meets Maon at the top of a hill after hearing her read out a story she is writing. When an incident between Kaoru and Norie, who also arrive at the top of the hill, causes everyone to start crying, Maon manages to calm everyone down with her whistling. After Fū returns to her father, Maon is able to come up with an ending to her story. Ten years later, Maon, who is now in middle school but is having trouble making friends, encounters Norie, who became depressed after a boy rejected her offer of sweets. As the two discuss their ambitions, they find something nostalgic about Maon's whistling and they become friends.
A：いつかのお話。秋の高台で一人本を読んでいる麻音。父親とはぐれてしまった楓。景色を見に高台へ遊びに来たかおるとのりえ。知らずのうちに集まっていた子供時代の四人。友達になる前のちょっと素敵な昔のお話。
B：ある日のお話。麻音は学校の帰り道に同じクラスののりえと出会います。普段と違いどこか元気のないのりえ。話を聞くとどうやら落ち込むことがあった模様。人に何かを伝えるのは難しいと悩む二人ですが不思議と二人の会話は盛り上がっていきます。のりえと麻音が友達となるきっかけとなった少し昔のちょっと素敵なお話。
