OVA
Description
Masaya Suda, a university student working part-time as a home tutor, receives a mysterious notebook accompanied by a letter claiming its power to control women whose names are written within. Initially dismissing the notebook as absurd, he tests its alleged power by writing the name of his student, Yumi Takanashi. When the notebook compels her to submit to his sexual desires, its terrifying reality is confirmed, and he begins exploiting it without hesitation.

He rapidly expands his focus to target the entire Takanashi family, including Yumi's younger sister Shiori and their mother Misako. Using the notebook's power, he imposes his sexual fantasies upon them, treating the situation as an experiment to systematically explore the limits of the notebook's control. He abandons all moral reservations, consumed solely by the pursuit of progressively intensifying demands to fulfill his desires.

His actions reveal a calculated pattern of escalating exploitation. With Yumi, an honest and academically focused student, he overcomes her resistance to male advances. He manipulates Shiori, who harbors a profound disdain for men, by orchestrating her humiliation into subservience. For Misako, a mother neglected by her frequently absent husband, he exploits her unmet physical needs to establish a sexual relationship. He methodically transforms each family member into compliant instruments for his fantasies.

Throughout all incidents, he maintains a detached, experimental mindset, viewing the family solely as subjects for testing the notebook's capabilities. He demonstrates no emotional attachment or internal conflict, driven exclusively by the pursuit of personal gratification. The notebook enables him to bypass every social and personal boundary, encountering no limitations in its use.

He persists in his manipulations without facing consequences or exhibiting any change; no narrative development or redemption occurs. His background remains minimal, defined exclusively by his status as a student and tutor, with no elaboration on his life beyond his exploitation of the notebook.