Aitsu ni Choukyou Sareru to Do M na Watashi wa Kanjichau

"Awaken Your Inner Sadist!!" The story takes place in the Tokyo suburbs. The protagonist, awakening to his dormant dominant instincts, sexually trains three heroines, documenting everything on camera. He monetizes these videos by streaming them online, and uses the profits to acquire specialized toys for the even more hardcore training... He humiliates the girls everywhere and in any situation imaginable... Gradually, the heroines awaken to their hidden masochistic natures, descending into full submission as his personal slaves... [Translated from DMM]