Muhyo & Roji's Bureau of Supernatural Investigation

Muhyo, Bico, Roji, and Bico's teacher Rio head down to the bottom level of the magic prison, a place swirling with ectoplasm. Many spirits lurk in the darkness since the talisman sealing this floor was removed. One of them, a Rain Dog, attacks the group, infecting Bico with a spirit virus. So Muhyo opens his magical law text and faces the Rain Dog...