One thing I didn't understand though, can someone explain what deal did 'Madam' and Sang Goo have , for him to…
I think a match like that(gambling) has a scenario that the fighters must follow in order to benefit the bar owner or in order to make the fighter get paid. In the seventh round he was too emotional(angry) from seeing and hearing his brother that it caused him to lose control and threw a powerful fist at Su Cheol.