Chapter 45-46: I take this one as the chapter where Sangwoo wanted to “start over” with Bum, but to do that, he needed closure. Killing the stepmom lady was his closure from his mother, while damaging the car was his closure from his father. His outburst in the mountains was him letting it all out and “born anew”. He assumed Bum's closure would be killing his uncle, since he knew that Bum already got his closure from that girl in high school when he killed Jieun. So he took matters into his own hands, as he said “you wanted someone to kill him for you”. So when Bum threw a fit over him killing his uncle instead of “thanking” him, he was taken aback.
Chapter 51: This!! Sangwoo finally said that Bum was not his mother. I think what he meant by that was, while his mother made him feel guilty for killing his father, Bum blamed himself. There was something like a slight smile on his face after Bum said he missed him. I think he never expected Bum to still love him after what happened and he was happy when he was proven wrong. That's why someone like him, who found another dude’s dick disgusting, still sucks Bum off. It was as if he was determined to keep Bum by his side, even at the expense of his preferences.
Chapter 45-46: I take this one as the chapter where Sangwoo wanted to “start over” with Bum, but to do that, he needed closure. Killing the stepmom lady was his closure from his mother, while damaging the car was his closure from his father. His outburst in the mountains was him letting it all out and “born anew”. He assumed Bum's closure would be killing his uncle, since he knew that Bum already got his closure from that girl in high school when he killed Jieun. So he took matters into his own hands, as he said “you wanted someone to kill him for you”. So when Bum threw a fit over him killing his uncle instead of “thanking” him, he was taken aback.
Chapter 51: This!! Sangwoo finally said that Bum was not his mother. I think what he meant by that was, while his mother made him feel guilty for killing his father, Bum blamed himself. There was something like a slight smile on his face after Bum said he missed him. I think he never expected Bum to still love him after what happened and he was happy when he was proven wrong. That's why someone like him, who found another dude’s dick disgusting, still sucks Bum off. It was as if he was determined to keep Bum by his side, even at the expense of his preferences.