Harry Potter: I Arrived at Hogwarts in the Past

I'm a fifth-year student at Hogwarts, from the 22nd century. That's right, the 22nd century. But after accidentally coming across a magic circle in the Forbidden Forest, I never expected to transmigrate to 1991, the era of Harry Potter in the History of Magic. And even more unexpectedly, I went from being a 15-year-old girl to an 11-year-old, which means I'll have to go through school all over again. As someone from an Eastern family of magic practitioners who has arrived in the age of the Dark Lord, all I wanted was to survive without trouble, save the professor if I could, and find a way back home. I never expected to meet so many people and experience so much here. Suddenly, I feel as if I came here to prevent their accidents, or even their deaths. I'm finding it harder and harder to leave this era behind. I think maybe, just maybe, I don't want to go back. (If you have questions, I've answered some in the synopsis. This should be considered a female-oriented romance, so there may be many male leads. If that's not your thing, please steer clear instead of saying so in the comments.)