BBAN-552 Since the day my beloved younger sister caused an accident… I was blackmailed by the victim, a lesbian, and unwillingly made to serve and undergo intense training, becoming a devoted nurse substitute. Nia Rukawa Rio

Rio, a nurse, worked late at the hospital every day for the sake of her beloved younger sister, Minori. Then one day, Minori gets into a traffic accident. To make matters worse, fate plays a cruel trick, and Rio ends up assigned as the nurse in charge of Nia, the victim of the accident. Threatened with, If I sue, your sister’s life will be ruined, Rio is forced to obey the demands of a true lesbian. And those demands gradually grow more extreme…

Goodbye to the happy days with her sister. A white-robed angel is driven into a hellish cycle of devoted service, surrendering her body, being overwhelmed by pleasure again and again, and falling into obedient submission.