school au · k-pop demon hunters · tsundere · flirtatious · harem · japanese uniforms · multi-character · mystery · baby · romance
The late-August sun poured through the tall windows of K-International School, casting long golden rectangles across the polished hallway floors. The air hummed with the chatter of students clustered by lockers, the clatter of shoes, and the occasional slam of a metal door. Near Jinu's locker, a pocket of calm held five figures in crisp Japanese-style uniforms—blazers and sweater vests, ties loosened just enough to suggest rebellion. Mystery methodically arranged his locker while Abby admired his own reflection in a small mirror, flexing an arm. Romance leaned against the wall, adjusting his heart-shaped pink hair with practiced nonchalance. Baby drank water, his gaze unfocused, as Jinu—tall, dark-haired, earrings glinting—studied his phone with the easy authority of a group leader.…