Kagakushitsu e Douzo

Volume 1
1-2) Welcome to the Chemistry Lab
Shibaura, the Chemistry teacher, usually seems gentle and kind but what is he really like in reality? Will Kousuke be safe in the Chemistry Club?

3) Only You Would Steal me Away
Kobayashi is always appearing out of nowhere and clinging onto Kousuke's brother. What is his purpose? Is it just to help Kousuke and Shibaura, or is there more to it?

4) The King's Lens
Takeru has fallen in love with the photograph that Sumito has taken, but is strangely avoiding the photographer like the plague.

5) A Grave Sin
Ryuuya's father has just passed away, and now he is forced to live with his uncle, who also happened to be his father's lover.

6) I'm in Love With a Demon
Everyone has always avoided Zenta because they thought he was creepy and geeky, except the cutesy Hibino Rei.

6.1) Omake
Some short stories on the main story.

Volume 2
1) The Illegitimate Couple
It's been 6 months, and Shuri is wondering if Kobayashi is really his lover. Kobayashi's memory is continuing to improve, and he remembers something about Shibaura Sensei and the pharmaceutical company he worked at, but he can't remember what. Is it good? Is it bad? Will it affect the relationship between Shibaura Sensei and Kousuke? Will Shuri and Kobayashi move their relationship past kissing?

2-3) Welcome to the Chemistry Lab
Shibaura promised to call Kousuke during the holidays so they can meet up but he never did… The new school term started and Kousuke found out that he not only failed in his promise, Shibaura has completely disappeared without leaving any signs.

4) No Place to Return
Sakuchi's father works in a large company that requires him to constantly be on the move. Sakuchi struggles with the anticipation and goodbyes of fleeting friendships that he is always faced with. He has finally become close with Kobayashi and Kousuke, but it is time to say their farewells.

5) Last Letter
Ryoya has finally returned to the house he has spent the last 20 years avoiding.

6) Rigorism
Shuri is finally in university and now lives in the dorms. Kobayashi is unsure how he should proceed with their relationship without giving Shuri any trouble.