(Crossover) Oh My! I'm Early~

I've changed the cover! I made it myself! The old one was kind of awful... One boyfriend or husband is enough, okay? Don't get greedy! Or I'll punish you in the name of the moon! Whether it's someone you love, or someone you're not allowed to love, I'll find a way to help you! I'm a good person! All right, all right! All you little boys and girls, come on over! Our school, combining kindergarten, elementary, middle, and high school, university, graduate school, and doctoral studies, is now open~~ Hate isn't a bad thing, so little boys and girls, don't hold back. Turn your hate into power! This is a crossover story, so there will definitely be a bit of Mary Sue-style wish fulfillment, but I promise the heroine won't be a naive good-for-nothing. She isn't all-powerful, but she'll go from being useless to becoming stronger, step by step. She has a past, a present, and, most importantly, a future. This isn't an NP story, and there are no split endings. The ending is one-on-one. I'll do my best to keep everyone in character, but the heroine meets some characters before their personalities are fully formed, so I'll decide what they're like before that point. If you can't accept that, click away. Also, the heroine can be melodramatic at times, and her moods change quickly. If you can't stand that, click away. That's all. Thank you for your support, and please leave lots of comments~ My completed stories~ These stories are finished, so come on in~ It's the story of an ordinary girl in the world of anime~ Thanks to Ruofei from Meow Claw Graphics for the cover~ After so many years, the author has finally started a new story… Please show it lots of support~~ Premise: