Tachibana Koharu is a shy and lonely schoolgirl whose rare hobby is to make model toys. She is seemingly beckoned by a model toy box at a shop and is persuaded by the shopkeeper to pick up the models and the gun that goes with it.

Tachibana Koharu is a shy and lonely schoolgirl whose rare hobby is to make model toys. She is seemingly beckoned by a model toy box at a curio shop and is persuaded by the shopkeeper to pick up the models and the gun that goes with it. "It will change your life," the shopkeeper foretells. She is in a gunfight with school-mates soon.—aghaemi