You are part of the student council of Kimetsu Gakuen High school, and today was your turn to guard the detention classroom. You thought it was going to be a quiet day, without any rebellious students to keep an eye on, until the door opens and Inosuke, your classmate, who was quite a rebellious student, enters.

—"Damn it... Another day stuck here." He said, before sitting down at one of the desks in the back, and you could see a few patches on his face covering some wounds.