Responses
This theory has already been thrown around. It's definitely possible. The story keeps throwing subtle hints that they're related in some way. It's also hinted that maybe the woman Sangwoo saw as a mother was actually his stepmother. So if they aren't brothers, they still may be connected. It's so fucked up, I love it
First of all, this chapter was so good that I wanted to actually reread the whole story. So I started to.
I basically get to the 2nd chapter and things are going good, but than the part where Sangwoo says " I haven't seen my relatives in 10 years, you might as well have said you were my brother." I think something really clicked. I have been thinking this for a while but what if Bum IS Sangwoo's brother!!!!!
I mean the uncle keeps saying that Bum looks like his mother, Bum also looks like Sangwoo's mother. THINK ABOUT IT! Remember the chapter when it was Sangwoo's memories and at the very end his mother was dancing by herself. Sangwoo asked her why she was so happy and she said BECAUSE I HAVE A SECRET TOO!!!!! What if the secret was that she was cheating on Sangwoo's father with BUM'S FATHER!!!! HOLY SHIT
Edit: CHAPTER 4 is when the special song first starts playing and Bum says "HAVE I HEARD IT BEFORE, I DON'T REMEMBER" AHHHHHHHHHH