Sensei's Secret

Real World - Kurobe-sensei, if caught in the act, might get tagged for such (*cough-cough*) "behavior" as a raging pervert and a sexual stalker, possibly jeopardizing her teaching job, and her appearance to society (that is, if such a thing matters to her).

H-Universe - she's considered perfect girlfriend or wife material (once Godai-kun graduates, of course), while some (if not all) of us mutter under our breadth to Godai: "You Lucky Bastard (GRR)!"

The More You Know.

Ah yes, the good ol' caught masturbating plot. Always a pleasure to see...Especially if the one catching her masturbating is the target of her affection. And also his fellow club members decide to be great wingmen and essentially made a situation where he had no choice but to hide with her in the locker.
I understand his fears about 'what if someone else walked in on you' though...One wrong tag and things could have gone awry. But luckily, the hentai gods deigned to smile upon this couple and made it so.

This doujin was written like a romance novel penned by Mr. Garrison.

That is an excellent upgrade to her secret.

Hook it up with a vanilla tag, no?

Shameless pervert. And she's pretty cute.

You want to know my secret? Well, technically it's not a secret... I want a sequel! It's too good to end here!

The sound effects and the expression that she makes when she gets flustered are worth reading to get to.