The school nurse feared by everyone, with her white underwear peeking out of her black tights.
And then she caught me peeping at it..... Thus began the s.e.c.r.e.t afterschool counseling

Tairaku is a high school teacher in a school full of bad apples, and as tiring as his life may already be, a chance meeting with a young girl is about to throw it into chaos. His home life, his school life, and his tentative relationship with a fellow teacher whom he has a crush on, are destined to teeter on the brink, thanks to this one young student. The girl in question is called Shirakaba Aya and her father has the utmost confidence that Tairaku will behave like a proper adult while they are living together. But Aya has the utmost confidence that Tairaku won't be able to keep his hands off her, even if she has to force him to do so.

There is something a bit twisted inside of the teenage girl Madoka. It comes out one day when she has to deal with a groper on a public train. He may be scarred for life by the time she's finally through with him but for her, at least, this encounter may only be the beginning.

Alternative note: If you are a male sub or a Female Dom, then this manga might be to your liking. If you're a Male Dom, then go read Nana to Kaoru instead of this. Nana to Kaoru is a much happier Dom/sub romance manga, whereas Ibitsu turns dark toward the end chapters.

From Yen Press:
The "Roman Club", a school group interested in the occult, to which he's practically enslaved, has become boring for one Hideo Aiba. In fact, he finds his entire existence pretty tiresome until, one day, when a girl named Kurumi Sahana shows up and wants to join up. When the two are left alone in the club classroom, Kurumi makes a special "request" of Hideo, which makes him (understandably) freak out. Though he doesn't know what to think, one thing’s for sure, Hideo’s life just became anything but boring.