I think it's a japanese novel? I generally only read JP novels. It was most likely translated. Premise is a person (possibly male?) who had a very bad life without a loving family died and got reincarnated as the daugther of the Demon King. She has two loving parents who treasure her so much, the Demon King made peace with humans for the sake of his daugther's future. Unfortunately she is super duper powerful and cant control her powers. In the past she has cause devastation and killed people unintentionally. So her parents have to keep her powers sealed and also periodically erase her memories of all the bad things she unintentionally did when her powers go beserk (for her own mental stability). Last thing I remember she was sent to a human boarding school to expand her knowlege or something.
okay nevermind, through extensive googling I eventually found it. It's not a JP novel but an english original written on Webnovel. https://www.webnovel.com/book/i-got-reincarnated-as-a-demon-princess_16049655606861305
I did try finding this when you posted the thread but couldn't find it so I just set the thread to Watch.....so that's why I couldn't find it.