I'm a Proper Fairy Tale [Anime Crossover]

What if Snow White from the fairy tale was no longer Snow White, but... the Tenth Vongola Boss? What if the prince in Sleeping Beauty was no longer a prince, but... Tetsuya Kuroko? What if the most beautiful mermaid princess under the sea was no longer a mermaid princess, but... Kusuo Saiki? Heaven knows what these fairy tales have been through! Reader's guide: 1. The author rambles a lot. 2. There will definitely be OOC. I don't know how bad it will be. Anyway, the OOC is mine, the glory belongs to the original creators. √ 3. Please don't compare rankings.