That Idol was a Gangster

3 years had passed since young Geon ran away from home and joined a shady organization. The self-centered brat died; replaced by a young gangster with plenty of experiences.

A lot of absurd things happened and now, he's back home with a goal:

Ding!

[Restarting system...]

Ding!

[Good day, Geon! You have been granted the main quest [Was it Worth It?]. Get ready to step into the world of stars-- find out if your best friend's dream was worth dying for. Become an idol.]

Oh, come on, [System Window]! He just turned 17.