Keisuke Shimizu's troubled household background profoundly warped his psychology, prompting delinquent behavior as a coping strategy. This environment transformed him from an ordinary college student into someone perceiving women solely as instruments for sexual gratification. His resentment toward human connections fuels predatory conduct targeting female students and teachers alike, rooted in an incapacity for authentic emotional bonds.

His manipulation tactics fuse psychological and sexual domination, epitomized by a high-stakes wager proposed to Orie Yuki—the class representative striving to reform him. He challenges her to serve as his sexual slave for three months, asserting this experiment will determine whether love or physical desire governs human behavior. The terms stipulate that if Orie feels no pleasure, he will attend school regularly and reform; if she experiences gratification, she must permanently cease efforts to change him. This arrangement reflects his cynical perspective and confidence in exploiting perceived vulnerabilities.

During the agreed period, he methodically exposes Orie to intensifying humiliation and sexual degradation within school premises, seeking to shatter her resolve and validate his conviction that women exist as objects for male fulfillment. His approach intertwines psychological coercion with physical acts to dismantle her self-worth while cementing his dominance. This dynamic underscores his obsession with power and conquest over mutual satisfaction, framing their interaction as a clinical experiment to affirm his worldview.

Though motivations remain partially veiled, narrative implications link his treatment of women to unresolved trauma from familial dysfunction. A former lover's emergence hints at latent emotional conflicts beneath his callous exterior, though his focus pivots overwhelmingly to dominating Orie after their pact begins. The ensuing spiral of consequences profoundly impacts both characters, eroding Orie’s initial optimism under mounting psychological strain.

No substantial redemption or transformation unfolds by the arrangement’s conclusion, preserving his core beliefs and behaviors intact. The narrative concentrates on the destructive fallout of his actions and the psychological wreckage wrought by the bet’s execution.