An OVA for R-15 bundled with the tenth volume of the novel.
Fukune Naruhara
Fukune Narukara
Taketo Akutagawa
Raika Meiki
Ran Musen
Tsukuru Kagaku
Ritsu Enshuu
Kurumi Kuroki
Katsuyo Kurabu
Utae Sonokoe
A list of similar movies.
