wait im confused...so who is the one who killed top's mom? is pungho's dad?

yup

Yeah he used Pungho bcs he knew Woon Ryong would go there and probs the mum tried to call but he didnt listen and the dad killed her and her guards. Pungho blames himself for being used and not killing his bloodthirsty dad. Woon Ryoung knows this but regrets not being stronger to protect both,while his dad blames him even though he useless as shit