Mamiko Noto
A visual novel developed for the PlayStation 2 entitled was released on July 31, 2008 and developed by 5pb. in limited and regular editions. The limited edition came bundled with an audio CD containing an image song and an original drama. The song, , is sung by Mamiko Noto, Ayako Kawasumi, and Miyū Takeuchi, the voice actresses of Kouta, Chizuru, and Nozomu, respectively. The audio drama is entitled . The game is described by the development team as a . The game's opening theme is "Happy Succession" sung by Ui Miyazaki, and the single containing the song was released on August 27, 2008. The ending theme is by Yui Sakakibara.