
Sooooo... Tae-sung killed Soo-young's father. From this dialogue I suppose it was an accident.
So when Tae-sung went after Soo-young to collect the debt, he already knew that his father was dead and perhaps he was only after Soo-young since the beginning. Maybe his father didn't even have the debt and he made that up to have an excuse to go after him? Or maybe I'm just overthinking this. ╥﹏╥
Don't burn those books! Let us read those fanfics!!