Taketo Nogawa, the sole heir to Nogawa Industries—a powerful corporation with alleged yakuza ties—remains indifferent as his corrupt father’s imprisonment sends the family business into decline, leaving its management to Yumi Okamoto instead.

Arrogant and self-assured, Taketo exhibits a herring and impulsive nature, prone to frustration and accustomed to having his desires fulfilled. When he witnesses his father’s car strike Yukie Kitazawa, his father, en route to the airport, charges him with avoiding litigation by coercing Yukie into a relationship by any means. Taketo has four days to succeed, after which his father promises to initiate him into the clandestine dealings previously kept from him.

Taketo blackmails Yukie, using the accident to force her into sexual compensation in exchange for avoiding legal action. He and his father further exploit the situation, targeting Yukie’s adopted daughters Rumi and Tomoko through a manipulative contract that enables their violation.

Now living as a “house friend” with the Kitazawa family in the father’s absence, Taketo pursues sexual relationships with both Yukie and her daughters. His past includes an infatuation with Yumi Okamoto, his father’s secretary, though she was involved with his father and thus considered forbidden. His interactions with Yumi remain tense and confrontational, frequently underscoring his laziness and immaturity.

The narrative does not follow a strict chronology and may include alternate endings or perspectives from different characters.