Gakuen Tengoku: Kashiwabara-kun no Junan

ja
学園天国 柏原くんの受難
Prequel
Published as manga Series is completed
High School Lullaby (Hideyoshico)
Gakuen Tengoku: Sore wa Koi desu Koizumi-kun· 学園天国 それは恋です小泉くん