Sano Kiri has one clear goal as he enters high school: to live an ordinary, uneventful life. He is acutely aware of his own compulsive behaviors, including a tendency to retreat to the restroom when stressed, and believes that a quiet, normal existence is the solution. His hopes for anonymity are immediately derailed when he catches the attention of his classmate Minamino Ryuu. Ryuu suffers from what can only be called a friend dependency, unable to function unless he is tethered to someone and flooding Kiri’s phone with messages the moment they are apart. This odd pair is soon joined by the mysterious and socially awkward Narasaki Subaru, who harbors a hidden affection for Ryuu. The fragile dynamic is further complicated by the addition of Ume Ki Nao, a female student whose delusional fantasies about romance add another layer of chaos to their daily lives.

Set against the backdrop of a contemporary Japanese high school, the story chronicles the summer days of this unlikely quartet. Each character carries a private burden, from Kiri’s anxiety about being "normal" to Ryuu’s desperate need for attachment. As they navigate school halls, text messages, and after-school meetings, their interactions form a strange but oddly pure friendship. The narrative explores the gap between the idyllic, glamorous youth depicted in media and the messy, awkward reality of adolescence. The author, Usamaru Furuya, has described the work as his personal version of Stand by Me, focusing on the fleeting, bittersweet moments of teenage life.

The single-volume manga is structured around the rising and falling action of that summer, leading toward an inevitable conclusion. As Kiri becomes entrenched in the lives of his eccentric friends, he begins to question his rigid definition of normalcy. The central conflict is not an external threat but the internal realization that the "ordinary" days he wished for are slipping away, and that the strange, vibrant, and often difficult moments he shares with Ryuu, Subaru, and Nao might actually be irreplaceable. By the end of the summer, Kiri comes to understand the preciousness of the chaotic world he stumbled into, recognizing that the bonds formed in this specific, odd place are what truly mattered.