Do S na Seitokaichou-sama ga M Note ni Shihai Saremashita.

Souta is just your typical high school guy whose whole world gets upended when he stumbles across a notebook called the 'M Note' — and it turns out this thing can make people do whatever he wants. The catch? The first person who gets tangled up in its effects is Shino Hidou, the student council president who normally has everyone at school wrapped around her finger. She's the type who walks into a room and people just fall in line. Watching that dynamic flip is exactly where the series plants its hook. This is a 4-episode OVA from studio PoRO, based on a light novel, so it moves fast and stays focused on that central push-and-pull between Souta and Shino. The supernatural notebook angle gives it a little more structure than you'd expect — think less random and more 'there's actually a setup here.' It's got that same school-setting energy as My Wife Is the Student Council President or Seitokai Yakuindomo, but with the power dynamics cranked up considerably. If you liked Shomin Sample's whole 'ordinary guy suddenly has authority over people way out of his league' premise, this scratches a similar itch. Just go in knowing what it is — it's hentai, it's short, and it leans hard into control and submission themes. The school setting and notebook gimmick give it a bit of a narrative spine, which makes it feel slightly more purposeful than a lot of entries in the genre.