I agree with @AmrynXPalladino and
@elfestz
I am regretting it, reading this. I felt my lust flowing again, it's a bad thing by the way. In hindsight, how amazing it is that no other person has dated this teacher currently. Such a charming cute girl but no other courters? There has to be a reason right? Even if she's an airhead, she is still lovable af and also is capable enough to be a teacher.
Wonder what happened to the teacher in the MC's original timeline...