Does anyone know anything similar have read it so many times i wish there was something that could match upto

I think there is something similar to this though I forgot the name of it and the plot was the same the girl is part of a three members idol and was known to copy a famous celebrity and the boy is a part of a already disbanded idol group I think? And the boy also transition to an actor and like the couple the boy fell hard first

Found it and the name is imitation btw it also have a kdrama(▰˘◡˘▰)