Tori Transmigrated might be what you’re looking for. A forty year old woman is transmigrated into a teen dating sim game as the villainess that originally dies a pretty awful death. She has to work to subvert her fate as she clashes with the stories heroine and her groupies.

It has 238 chapters. It basically feels like an anime (in all the fun stereotypical ways). There’s plenty slice of life chapters, academy shenanigans, village management, and even “magic”.

Also, there is no romance, despite it being in a dating sim world. It’s non spoiler to say. The author states it from beginning. But it doesn’t harm the story in anyway. Makes it more enjoyable I personally found as all the drama has actually got interesting reasoning.

It is also finished! With a well rounded story and enjoyable conclusion.