Forgotten Title Former boy band trainee becomes a hugely famous actor after having his music stolen

Hey!

I've been on the hunt for a light novel I read awhile ago, but the name escapes me.

Details:
* Male boyband trainee is kicked from the band, and his vocals are stolen for the debut song. He doesn't fight the company and chooses to leave, believing the music industry is blocked to him. However, he does got into acting and becomes successful.
* At one point the MC is invited on a parody of Masked Singer and kills it. One of his opponents is the boyband member who replaced him and claims to have sung the vocals that MC had done for the debut track.
* At one point the MC appears on a variety show that parodies Running Man.
* I'm pretty sure this was a regression/second life story where the MC takes a different route, and it really pays off.
* Pretty sure it's Korean but possibly Chinese.
* I don't recall a romance, but it could be BL. Pretty unlikely tbh.
* I think he has a mother, sister and stepfather, and the parents work at a jewelry company??

Much love if anyone can find this. I keep finding other entertainment novels, but just not this one that I'm stuck on!

 

I think it is called I'm A Star.

 

'Become a Star', I think.

 

Is it on NU?

 

Yes, see link

 

Thank you! This is it!