That Idol was a Gangster

A former gangster struggling to become an idol. Presenting: Our little tuna! 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. (7 new chapters a week)