Sasaki-sensei [Haise x Reader]

In this story, Sasaki Haise is a high school teacher. About his past and his affiliations with the CCG will be revealed further in the story. This story is intended to be Haise X Reader fanfiction. But instead of using [reader] or [y/n] or [you] etc, I use the first person point of view [I] to avoid hassles and to ma...