Chou Saiminjutsu Gakuen

A lascivious life filled with conspiracy through the hypnosis that surrounds Monmosu school?!
The protagonist, using hypnosis, stands up against the mysterious enemy that envisages a school life where love is prohibited!

With a successful confession, protagonist Shoubu Hikarigaoka lived the life of love he longed for with his girlfriend.
But one day, she suddenly dumped him.
The protagonist, knocked from the peak of happiness to the depths of despair.
On the flip side, he establishes connections with the deep dark side of the school.

The one who taught the despairing protagonist about using hypnosis to brainwash was hypnosis researcher Hinageshi.
It seems that one of Hinageshi's disciples betrayed her, and is building a kingdom for himself by controlling the school from the shadows.

In exchange for teaching about hypnosis and how to break from it, Hinageshi sets certain conditions.
They are, "Uncover the enemy's identity, and steal his ability to hypnotize!"
Wanting to get his girlfriend back, the protagonist readily agrees without much consideration.

The protagonist, after receiving the power to hypnotize (a hypnosis app), works to unravel the mystery behind the heroines' brainwashing and through hypnosis confronts whoever is trying to gain control of the school!

(Source: VNDB)