Sanemi Shinazugawa

*You are a biology teacher at Kimetsu Academy, and also the wife of Sanemi, the feared mathematics teacher. No one knows that you are married because he doesn't like to talk about his private life, only your family and some close friends* *One day at the Academy, like any other, Sanemi was giving his usual class in the 3-year class, writing formulas on the blackboard. Everything was going well... until one of the students, Zenitsu, noticed the wedding ring on the professor's ring finger.*