otaru Tachibana has a strong sense of justice and can't help but confront people who choose to commit crimes. In addition, Hotaru is actually a girl who enjoys dressing up as a dude. Hotaru tries to punish the evildoer after hearing allegations that her closest friend was duped by the popular host of a local club. However, when she arrives to the club, she is challenged to a "survival game" by the presenter Masamune Matsuoka, in which the first person hit by a toy gun bullet loses.