Mr. Secret Floor - Shousetsuka no Tawamure na Hibiki
Complete | ASAGIRI Yuu,TSURUGI Kai | 2000 released
Mr. Secret Floor - Prince of Flame
Complete | Tsurugi Kai,Asagiri Yuu | 2000 released
K-sensei no Yajuu na Aijou
Complete | NATSUMIZU Ritsu | 2012 released
K-Sensei no Furachi na Junai
Complete | NATSUMIZU Ritsu | 2000 released
Kanraku Alpha ~Enigma~ 4 verse