Kinji wants to be normal, but his secret condition makes student's desire to make him their partner.

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; a bus full of Butei High students is hijacked; Aria calls on Kinji to team up with her to save their classmates.

Kinji trails Aria to the police station and learns why she's so desperate for a partner; Kinji realises she could be the Butei killer's next target.

Kinji corners the Butei killer aboard a jetliner, who makes an explosive escape; Kinji and Aria try to land the plane safely.

Aria volunteers to guard Kinji's friend: Kinji gets caught in the middle of a constant cat-fight!