Responses

Basically, the MC (Hoyun) is in a parallel universe where only he becomes younger, and the system wants him to become a top idol or he can't leave. He blackmails one of the top composers and one of the top idols to help his group (the Dawn) rise to fame during their comeback.
Now, they are performing on a survival idol show against other male idol groups who are 1-4 years old. One of the groups (TwoDay) is currently being chosen for 1st place due to their company's influence, but Hoyun is setting up the stage to tear them apart.
I've read like, four idol manhwa this past week so I don't remember the plot of this one