The story centers around Yui, a high school boy who often goes with the flow of those around him, which typically ends up with him going along with things he doesn't agree with. In these situations, he is fed up with his inability to do anything but say no. On the other hand, there's his eccentric classmate Haru, who is completely unable to read between the lines. Then, a certain incident leads Yui to lash out at Haru, "Read the room! Do you know what it means to ’play along'? That's how you create good relationships with people," to which Haru responds, "How meaningless." 高校生の五月 雨は、悪友に流されながら毎日を過ごしていた。 そんなある日、独特な喋り方でクラスから浮いていた四月一日 晴にカラオケで遭遇する。 雨は、それをきっかけに四月一日から学校内でもしつこく話しかけられ、 「ノリ」の分からない四月一日に苛立ちを隠せずにいた。 正反対のふたりだったが、親の都合で同居することになってしまう。 ふたりの抱える痛みと嘘は、同居によってどんな化学反応を引き起こすのか…。 bitterで切ない、大人になりきれない未熟なふたりの成長ストーリー。