Kagakushitsu e Douzo 

1-2. Kagakushitsu e Douzo (化学室へどうぞ, Welcome to the Chemistry Lab) Shibaura, the Chemistry teacher, usually seems gentle and kind but, in reality, is a beast. Kousuke loves this Shiba-chan but will his chastity be safe?! 3. Kimi dake ga Boku wo Ubaisaru (君だけが僕を奪い去る, Only You Would Steal me Away) The story of Kousuke's brother and his best friend. 4. Ou-sama no Lens (王様のレンズ, The King's Lens) A student photograph and his model. 5. Juuzai (重罪, A Grave Sin) Revenge of an angry son upon his dead father's lover. 6. Boku wa Akuma ni Koi wo Suru (僕は悪魔に恋をする, I'm in Love With a Demon) A lonely otaku boy loses his eyeglasses and he looks very handsome, but...? Note: Includes two extra chapters.