Reincarnated as the Trash's younger brother

DISCLAIMER: I don't own any character, Plot nor place. I'm not that creative. Even the idea was inspired by someone's works. So credits to those that gives me the courage to do this.

WARNING: I'm not really good at English, neither am I any good at being creative. But I'll do my best in trying to put my Oc in the scenes. Some Canon plot point won't happen the same way the Story had gone through or the dialog would differ as I don't have photographic memory.

SUMMARY

Kang Sangmin died in an accident at his own 15th birthday. Having nothing else to look back for, he accepted it fairly quickly.

However...

["Let's make a deal"]
Sangmin: I don't want to
["..."]
["Somebody made a deal for you, I'm just informing you"]
"Son of a bITC--"

Who would've guessed that he would reincarnate the weak and mute brother of the trash?