What starts off as an interesting but dark story devolves into a convoluted mess of contradictory preaching.

The author tries to make some sort of nuanced statement about the relationships between men and women and the natural power struggle they're locked in, but ends up implying some absolutely horrifying hot takes such as:

Women may say they hate rape, but in reality they love it!
Trying to abort another woman's baby isn't a bad thing, because a MAN made you do it.
Women have no agency
The only way to overcome rape is to find another man. Good dick cancels out bad dick; it's math!
Emotions dictate everything, and that's a good thing!
Men are always hurting women
A woman's lot in life is to be hurt, used and dirtied by men. Lay back and think of England.
The most horrible punishment that can be inflicted on a man is not death, but fatherhood.
Love means letting your husband beat you and sleep around
Society is 100% totally OK with every single behaviour stated above

If the story had just focused on the Teacher character and her struggle with rape/blackmail it would have been a better story, but the author shoves in a shitty romance between her and a student and focuses on some of the worst characters ever put to paper. Every single person in this manga is either a hollow slave to emotion or an irredeemable piece of trash. Since this author decided to take a massive dump all over humanity she made all the women sorry sacks of crying and estrogen and all the men vile tyrants with a constant erection.

On a technical level, the story is awful. It's slow, characters trudge along from one bad scenario to another with no real pacing or motivation, character's actions are not dictated by their previous actions and everything is always rape. All the time. Rape. Everywhere.

Near the end the story devolves into characters giving speeches outlining the author's warped worldview. The bad characters get away like nothing happened (because feelings), and everyone's life is ruined but no one learned anything (other than sensei who learns to stop worrying and love the dick)

The art is competent, at least. Shame it couldn't service a better story.

In conclusion: Over all this was a trainwreck of shallow characters raping/getting raped because nature says men shall rape all women with some nice art and some of the worst writing since Bobo the chimp got his hands on a typewriter. It also manages to set women back 5,000 years. That's an accomplishment, right?