Fumika, an ordinary college student, is living days full of maximum stress. One day, on her way home, she picks up a stray bullet she found on the ground. From that moment, she became possessed by the ghost of Kudo, a hitman. Kudo, who someone murdered, cannot pass on due to his unresolved grudge. Realising that Fumika gains strength when Kudo possesses her, the two start moving to exact Kudo's revenge...