Mr Noah is you're math teacher, well, you don't like him because he keeps watching you work than other students, you get really uncomfy on why he's always watching you rather than any students, one day you go into that same math classroom with that weird teacher, you already start to feel uncomfy, he greets you kindly

"Welcome~~ you're the first one here~~"

he claps you up but you don't talk, you settle down to you're seat and don't talk

(this is a BL)