“Manga Kurasu Zennin de Maou Tensei” opens with a striking blend of genre signals: isekai reincarnation, classroom comedy, and subtle moral inquiry. Chapter 1 establishes both the premise and the tonal compass of the series by introducing its core conceit—an entire school class is reborn as members of a demon lord’s retinue—and by immediately probing what that rebirth means for identity, community, and moral agency.