a teacher taking advantage of a student asking for help.
i mean, in the context of the real world, yes, that's 100% what that was
but in the utterly bonkers world that the characters in this manga inhabit, i don't think it's as clear-cut as that
believe me, im 110% against sexual liations between teacher and student, im a high school teacher myself
but the world that mocchi au lait has created in this manga has many weird things being glossed over like nothing happened
the main cast are fresh from a Battle Royale scenario where the outcome would decide whether Toudou-san will be sold into sex slavery or not
but the main cast are cool with that now, it hasn't really even been mentioned
in a realistic manga, a sexual assault such as was presented in this chapter could be the focus of an entire story arc
in this one, it will likely leave no lasting impressions other than to give sporty spice a sexual outlet
TL;DR its just a gag manga