On Valentine's Day, popular mystery author Aigasa Kurisu invites Kiyotaka and Aoi to the Shinkokan at the Yoshida-Sanso. But instead of an innocent book reading, they find a group of suspects and a mystery to be solved.
Ijuin-sensei (Takeshi)'s Supervising Editor
Hashimoto
(مشرف التحرير إيجوين-سينسي (تاكيشي
هاشيموتو
Herr Ijūins (Takeshis) Hauptredakteur
Editor a cargo de Ijuuin (Takeshi)
Hashimoto
Editor a cargo de Ijuuin (Takeshi)
Hashimoto
- Editor del maestro Ijuuin (Takeshi) -
Editor supervisor do Ijuin-sensei (Takeshi)
Hashimoto
Контрольный редактор 
господина Идзюина (Такеси)
Хасимото