Ever since he returned from school Kazuki has been thinking about the he had with Eriko and the words which followed. So the next day he asks for some info on her from Akira but is unable to get anything helpful. Today is also the first day for all the freshmen so Nana, who's able to make a new friend, will be joining him from now on. Later Mao notices Eiji playing the sax and is finally able to get through to him.
０点の答案を折った紙飛行機を拾った一輝。持ち主である天才少女、二見瑛理子のもとに届けるが、彼女はいきなり「実験」といって一輝にキスをして立ち去った。翌日は入学式。各部の新入生勧誘の騒ぎをよそに、放課後あてもなくぶらつく摩央はサックスの音色に気づく。それは同じクラスの甲斐栄二の奏でる音だった。ミュージシャンになるため、受験に興味はないと言い放つ甲斐。何故か摩央はその言葉に共感し、彼の前で受験の話をしないことを誓うのだった。
