Young and innocent office worker Mari is fated to become the bride of the powerful Tanaka conglomerate, but her marriage is actually a transaction to settle her real father's massive gambling debts. Under the pretense of saving her family from financial ruin using the conglomerate's wealth, Mari is wed into the Tanaka household. However, this union is far more than a simple marriage—it marks the beginning of sexual domination by three generations of men. Held hostage by her father's debt, Mari is helplessly subjugated by her husband and his family, forced into a state of powerless humiliation. She is put on display and used repeatedly in the president's office, office spaces, living room, and break rooms, her body drenched in saliva as she is trained like a submissive object. Her armpits, legs, and buttocks are licked obsessively, her face twisted into an aroused grimace as she endures overwhelming shame and degradation, unable to resist as her body is offered up. Chairman Tanaka, her deranged father-in-law, is a twisted pervert who has grown bored of sexual favors from business partners and now craves new thrills. Meanwhile, eldest son Hideo and second son Yuuki both lead depraved sex lives. Mari is forced to accept each son's fetish without resistance—sucking Hideo's thighs, licking Yuuki's armpits, and servicing Kazuma's crotch according to their individual desires. Across the office, break room, and living spaces, she is dominated by the three men and made to surrender her body completely. Chairman Tanaka rips her fishnet tights, licks her ankles, and shoves his cock into her mouth, callously toying with her body even while speaking to her father on the phone. For the sake of her family and under the demands of her in-laws, Mari sacrifices herself completely, surrendering to the pleasure of the moment despite her suffering.