Immorality

When Sayako Saeki transferred in as the new school nurse, every student in the building took notice. She's got that effortless presence that makes people pay attention — but something about her doesn't quite add up. The more you watch her interact with curious student Ryouichi and the increasingly suspicious staff member Kirika, the more you sense there's something lurking underneath the charm. Is she hiding something supernatural? Something darker? The show teases that question with a slow-burn tension that keeps the setup genuinely interesting. Don't go in expecting a straightforward school story — there's an occult undercurrent running through the whole thing that gives it a different texture than your typical nurse-themed OVA. If you've watched Bible Black and appreciated how it layered mystery into its setup, this scratches a similar itch. Fans of Night Shift Nurses who want something with a bit more atmospheric intrigue might also find it worth two episodes of their time. It's a short commitment at just two episodes from Piko Studio, adapted from a manga, and it leans harder into mood and character suspicion than most titles in its category bother to do. The school setting grounds it, but Sayako herself is the reason to stick around — she's the kind of character where you keep watching just to figure out what she actually is.