Yujiro Takashiro, adopted into the fading Takashiro noble family, leverages his administrative acumen to temporarily stall their financial collapse caused by the current head’s mismanagement. His efforts position him as indispensable to the household’s fragile stability.

He engages in a clandestine affair with Nanako, the family’s biological daughter, whose concealed affections clash with rigid societal and familial expectations. When her mother uncovers their physical relationship, Yujiro is swiftly exiled to England, severing his crucial role in delaying the family’s ruin. His absence accelerates their downfall as external creditors, seizing the opportunity, demand repayment.

The family’s vulnerability post-exile forces Nanako and her mother into sexual servitude to appease debts. Yujiro’s activities after his expulsion remain unrecorded, though his removal irrevocably triggers the exploitation of those left behind.