Ijirare: Fukushuu Saimin

When a high school guy named Tasaki gets caught in the wrong place at the wrong time, a group of popular girls decide to use that moment to completely flip the power dynamic in their favor. What starts as a single embarrassing incident turns into an ongoing arrangement where they hold leverage over him and make full use of it — and the story leans hard into how that control plays out within the school setting. The tone is dark and doesn't sugarcoat the manipulation involved, which is kind of the whole point. This is a 4-episode OVA from T-Rex, based on a manga, and it moves efficiently because it has no time to waste. The animation quality holds up well enough that the intensity of the scenes lands the way it's supposed to, and the soundtrack matches the darker atmosphere rather than undercutting it. If you've watched Kansen: Inyoku no Rensa or Mesu Kyoushi: Injoku no Kyoushitsu and liked the school-based power dynamics in those, this covers similar ground with a focus on revenge and control framing the whole thing. It's not subtle about what it is, and if that kind of manipulative tension set in a school environment is what you're looking for, this delivers it in a compact, focused package without dragging things out.