Onee-San Wa Joshi Shougakusei Ni Kyoumi Ga Arimasu.

Chapter 37: How To Not Scratch An Itch
Vol.6 Chapter 36.4
Chapter 38: Magical Girl Kokopure
Vol.6 Chapter 36.4
Chapter 38: Magical Girl Kokopure
The comedic story about a high school teacher, who happens to be a pedophile, and the girl she babysits with her roommate!
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