I thought about this too. At first i thought his father killed his father then Sangwoo killed his father because of that.. But after reading chapter i think Sangwoo killed both of them. Well as you said we will find out it in next chaphers :D
I've also thought about it and it seems like Sangwoo has abandonment issues, so what if his mom tried to run away and leave her asshole husband but also abandon Sangwoo which is why he killed her.
Yeah! i agree. Which is why everytime bum moves he gets afraid and feels like he can't trust him.
the last chapter when he was kicking the poll and we saw, brief image of a woman being strangle. i do think that's his mother
Yeah, it was his mother... and did I write ''father killed his father..''? What the hell?! xD
We all know Sangwoo's father was a Dick and so is Sangwoo. But I wonder did Sangwoo's father kill his mother, and then Sangwoo killed him. Or did Sangwoo killed his father and his mother tried to stop him then he killed her? or did something happened? WE WILL FIND OUT ON THE NEXT EPISODE DRAGON BALL Z ( no no no,(⊙…⊙ ) okay, i'll stop )