Hitozuma Un'yu Saimin NTR Ben ~Sudou Junko no Yuuwaku~

He majored in psychology at college. He used the “results” of his research to humiliate those around him. The protagonist, who was expelled from the university and became a criminal, and decided to hide out in the dormitory of a transportation company in a country town.

While he is thinking about quitting his job as a carrier, Junko Sudou joins the company. She becomes his delivery partner and is kind to Kenichi. Junko is different from the other women he has worked with and they are compatible with each other.

Kenichi is convinced of this, and he uses the “results” of his hidden research to hypnotize Junko. Thus, Kenichi repeatedly acts with Junko,

He spends his days in hypnosis and pleasure. Junko's true nature is gradually revealed, and Kenichi is astonished. And what Kenichi, who loved Junko, saw was something that made him doubt his eyes.

[From official site]