Responses
The uke is wayy older than the seme. Seme was literally his fan I think, when he was a child and the uke was already a well established artist
Only one I can think of is Dear My Killer Tune. If this isn't the right one read it anyway it's really good!!
Guys there's this manga actually I haven't even read ts but as far as I remember there was an older artist I think he was a guitarist? Singer? Smth like that and the top was his fan since he was a child I think? Omg I really wanted to read ts but it disappeared from my list