Kick-Heart is a love story between Romeo, a successful pro-wrestler, and Juliet, a nun who lives a secret double-life as a female pro-wrestler.

July 1998 - After a group of delinquents is found dead in their hangout place with all their limbs twisted and torn off, Aozaki Touko receives a request to find the murderer and asks Shiki for help. The main suspect is Asagami Fujino; a girl who was the boys' plaything until recently, who Shiki believes to be "one of her kind".

Before the release of the final 7th movie, a remix work "Kara no Kyoukai Remix-Gate of seventh heaven-" comes out in theaters on March 14, 2009. This remix collection extracts the key themes and scenes from first six movies. The hour long movie is organized in chronological order, beginning from the 2nd movie, followed by the 4th, 3rd, 1st, 5th and 6th. It's a mixture of mostly existing scenes, and some new scenes.