
Yeah the man in jail killed his brother but song myungshin was the cause of it cause he told the man about his brother. The woman and the kid was the wife and children of the man that killed his brother. Like u can see the Flashback the kid grew up and for the stuff maybe the husband brought it home after killing? I actually dk that one ╮( ̄▽ ̄)╭

the man in jail was the one who physically murdered his little brother. he was originally supposed to kill myungshin for revenge against yoohan since he had a vendetta against him (yh used to work for loan sharks), but myungshin ordered the murderer to kill yoohan’s brother instead since it’ll affect yh more. but the murderer wouldn’t have known about yh’s brother if myungshin didn’t tell him, hence why yh says that myungshin is the murderer
Sorry i didn't get the last chapter, who actually killed his brother? Song myungshin or the man in the jail? And who is the woman who gave him his lil brother stuffs? How did she had his lil brother stuffs? Someone please explain I'm so clueless