HEZ-821 After 10 consecutive night shifts, the pure-hearted nurse Mizukawa Jun reaches the limit of both body and mind, gets overwhelmed by desire, and turns into a desire-driven zombie.

My older sister is my pride and joy. Even back in school, she had excellent grades. She’s capable, upright, and the kind of ideal woman admired by other women too. One day, she cheerfully took on an unreasonable shift, and before she knew it, she was working ten straight night shifts. Naturally, both her mind and body became completely exhausted, and her self-control began to give way. To reward her hard work, she had some drinks, which ended up lowering her inhibitions even further and completely overwhelming her reason.