Oshioki: Gakuen Reijou Kousei Keikaku

Before the school year even starts, Shimohei Joutarou shows up at a prestigious all-girls academy, and within his first day as the new school doctor, he's already stumbled onto secrets he probably wasn't supposed to find. Two students, Mitsuki and Minami, have something they're hiding. A younger sister's grades have mysteriously skyrocketed in ways that don't quite add up. And the Classics teacher, Kuji Hinako, seems to be pulling strings behind the scenes. Joutarou decides it's his job to set things right — his way. This is a 3-episode OVA from 2011 adapted from a visual novel, so it's short and focused. The setup leans into that classic authority-and-discipline dynamic you'd recognize if you've watched things like Discipline or Bible Black — it's very much in that same lane, built around a school setting where power and rule-breaking drive the story forward. The character work ties students and faculty together in ways that actually give the plot some structure beyond just the surface-level premise. If you liked Night Shift Nurses and enjoy hentai that at least gestures toward a coherent story rather than just stringing scenes together, this scratches that itch. It's not trying to reinvent anything, but for a 3-episode runtime, it moves quickly and keeps the character dynamics consistent throughout. Go in knowing what it is and it delivers.