Sotsugyousei (Sequel)
Sora to Hara (Spin off)
O.B. [Occupation to Beloved] (Spin off) - sequel to Sora to Hara
Doukyuusei & Sotsugyousei Fanbook (Side Story)
Doukyuusei (Prequel)
Sora to Hara (Spin off)
O.B. [Occupation to Beloved] (Spin off) - sequel to Sora to Hara
Doukyuusei & Sotsugyousei Fanbook (Side Story)
Doukyuusei (Adapted From)
Sotsugyousei (Adapted From)
O.B. [Occupation to Beloved] (Sequel)
Doukyuusei (Adapted From)
Sotsugyousei (Adapted From)
Sora to Hara (Prequel)
Contains all couples from this series
Endou-kun no Jikken Note (Sequel)
Imamade Korekara (Spin-Off)
Tsuda Memo (Sequel)
Endou-kun no Kansatsu Nikki (Prequel)
Tsuda Memo (Prequel)
Datte, Oishii No Ga Warui.