Title, basically. I can't for the life of me remember the name of this manga I read a long time back. The MC had a younger brother who's supposed to be someone special and there's a bunch of families who're interested in him but for some reason the power or whatever transfers to the MC instead? The plot wasn't super focused on the romance but it was there and the ML was one of MC's classmates and had long hair in a ponytail at first (but I think he cuts it later on?? Or maybe I'm tripping). There's this other guy who was interested in the brother at first but then becomes interested in the MC later on. And I think they were all reincarnations of angels or demons or something of the like.

This was all over the place but please let me know if anyone knows what I'm talking about!

Nevermind, I found it quite literally right after posting this lol. It's Genwaku no Kodou.