Kinji's racing death trying to keep a bomb on his bike from blowing when a hot-headed girl with major combat skills dives in to save him and unwittingly fingers the trigger on his secret "Hysteria Mode."Aria tries to strong-arm Kinji into teaming up with her — by threatening to live in his room until he complies! When he fails to shake her, the two end up on a cat caper. Later, Kinji decides to investigate the transfer student's background.Aria shows her cute side when she follows Kinji to the arcade after school. Later, when a bus full of Butei High students is hijacked, Aria calls on Kinji to team up with her to save their classmates.