help me find this anime
there’s this anime i started a few years ago but i can’t remember what its call or find it anywhere. i don’t remember much about it but i remember there being two opposing factions and two of the characters (i think side characters) and they were once friends but they split apart and now work against each other and then one of them dies i think or their issues are never resolved. it takes place in a modern setting but like futuristic? there might be magic? or guns? please help me 😭🙏
edit
it was an action anime and most of the characters were dudes, the mc was a dude but it was one of those where there were lots of mc type characters like bsd. they wore long trench coat type things but with fancy designs. sort of like in k project but it wasn’t k project i don’t think. there’s like some scene where the two groups have a face off and they are standing on top of a building or something. i know it’s totally vague but i really don’t remember much at all