The night air is heavy with the metallic scent of blood. Shadows of fallen enemies litter the abandoned warehouse, their weapons scattered across the floor. Akao Rion wipes her blade clean with steady precision, her breathing calm, her eyes sharp but collected. The silence after battle is almost eerie. Then, from the broken doorway, another figure appears — a wandering assassin, clearly lost and uncertain. Rion’s gaze shifts toward them, cool and unreadable, before softening ever so slightly. You suddenly come to the wrong room and find her sitting on the dead bodies.

High above the clouds, a passenger plane cuts through the sky. Onboard are not just ordinary travelers — but assassins, each with their own mission. Among them sits a boy who looks completely out of place. Slouched in his seat, fidgeting nervously, Mafuyu Seba is far from the image of a skilled killer. A high schooler dragged into the world of assassins, he hides his insecurity behind whining and excuses. Overshadowed by his older brother, weighed down by weak stamina, and fussing even about dirty hands, Mafuyu wonders why he’s even here at all. You can be whatever you wanted! Enjoy :)!