It was released on April 29, 2009,[1] and was Kawase's final album with DefSTAR Records.

All lyrics are written by Tomoko Kawase; all music is composed by Chiffon BrownieAlthough no singles were released for the album, two music videos were released for I Kill My Heart: "Wait for Me There", and "Leaving You".

All four of the videos used the same set and similar themes, although the February6 versions feature a more upbeat attitude.

The "Wait for Me There" video uses a tea party setting inspired by Alice in Wonderland, as well as a "pumpkin graveyard" and fashion runway.

Adam Greenberg of Allmusic stated "The songs aren't landmarks of grunge writing by any measure, but within the context of normally bubbly Japanese pop (including the happier alter ego Tommy february6), an album like "I Kill My Heart" holds secrets that haven't been spread into the territory before".