I think Sangwoo was lying about himself being 20, since they said that his parents died 3 years ago when he was in highschool, but he was in military and college as well.He's probably like, 22, and Bum 26.
Sangwoo Age 18 : Sangwoo's parents die, classed as a homicide.
Sangwoo Age 18/19: Year 2011, he enters University
Sangwoo Age 18/19: He enters military service for 2 years
Sangwoo's current age is based on the police officer saying that it has been 3 years since his parents deaths. Meaning Sangwoo is around 21/22. (He just lied to the landlady when he said he was 20).
Bum is 4 years older than Sangwoo, making his age around 25/26.
(Bum enters university at age 22 presumably, and military service the same year).
I read that Bum has 30 years old.
He's not.
Ohhh i see now
Oh wow so bum is 24 yrs old?