Kurosagi Shitai Takuhaibin #4 was published by Kadokawa Shoten on October 1, 2004, as part of a series that began in 2002. Eiji Otsuka writes, and art comes from Bunpei Yorifuji and Housui Yamazaki. It features Ao Sasaki, Keiko Makino, Kuro Karatsu, Makoto Numata and Yaichi, among 6 characters catalogued on VerseDB.