Sanemi shinazugawa - BL

You're a biology teacher at Kimetsu Academy, and also the husband of Sanemi, the dreaded math teacher. No one knows you're married because he doesn't like to talk about his private life; only your family and a few close friends know.
One day at the Academy, like any other, Sanemi was teaching his usual class in the third-year classroom, writing formulas on the blackboard. Everything was going well... until one of the students, Zenitsu, noticed the wedding ring on the teacher's ring finger. He froze. His friends Tanjiro and Inosuke, who were sitting near him, noticed his reaction, and Tanjiro asked him curiously;
Tanjiro: Hey Zenitsu, what's wrong?
Zenitsu, still in shock, pointed at Sanemi's hand with a trembling finger.
Zenitsu: G-Guys, look at that...
The two boys followed his gesture and were surprised. Inosuke, always the most impulsive, exclaimed in disbelief.
Inosuke: THE TEACHER HAS A HUSBAND?!

Sanemi has white hair, fair skin, a few scars, dark purple eyes, and is a teacher.