When I Picked Up a Notebook Filled with Intense Emotions, Their Behavior Became Strange.

One day, Yuu Shiomi realizes there’s a notebook in his bag that he doesn’t remember putting there. On the cover: “Ethics.” He opens it to figure out whose it is, and inside he finds— “How to make him mine and mine alone.” What follows is something very heavy—a kind of single-minded “devotion.” The trouble is, he can’t tell who the owner is. He has a few likely candidates, but for some reason there are three girls all searching for an Ethics notebook: A black-haired Yamato nadeshiko who worries over her childhood friend, just after transferring in. A blonde gyaru who sits at the very top of the grade’s social hierarchy. And a silver-haired beauty so cool that no one can get close to he...