I just recently got in to anime (I don't talk about it to anyone though and this place is anonymous so why not)

I was wondering if anyone has any recommendations for my taste.
Things that I like;
> Romance/Harem/Ecchi
This is a given. I'd prefer it to be at least romance/harem. I don't really care if it's ecchi or not, but it's neato if it is. I liked High School DxD
> Fantasy/Isekai/School
If it's a fantasy, awesome. Preferably Isekai (I LOVED that one time I was reincarnated as a slime. It's one of my favourites.) or if it is something to do with school (Wise Man's Grandchild, Absolute Duo and that stuff)
> Magic
Magic's pretty cool
> Super-duper-pooper op main character
I don't know why, but I like it when the MC is super overpowered, but doesn't always show it/is really modest.


Thank you very much :)