So it might just skirt on your point 3, but I have a very lonely You at elnysa! It does have a minimum age of 16 (but Yoshiko's birthday is July, so I... guess she hit it during the summer episodes? Who even knows, Love Live) and is sex-friendly, but all of the sex stuff is 100% opt out.

You is missing Aqours something fierce, and there are opportunities for non-powered characters to get powers! Her idol performance magically inspires people, for instance.

But! It does kinda closely skirt that point 3 of yours, so totally understand if it's not your interest o7