
his friend has same age with woojin http://www.mangago.zone/read-manga/escape_into_oblivion/uu/escape_into_oblivion-chapter-19/8/. and hwon older than woojin http://www.mangago.zone/read-manga/escape_into_oblivion/uu/escape_into_oblivion-chapter-2/13/

There is no guarantee if he went to juvenile prison. If he attacked and killed the beggar then why the aunt should give money to "such a child". Do not get me wrong, I am not sure if you are right or wrong. I just believe that there is a small posibility that he is the friend especially under the yaoi spectrum! (〜 ̄△ ̄)〜

i kinda believe that Hwon is the Woojin's first love (his friend) ...because during the sleep... Hwon told Woojin that " can i tell something to make you sleep easier? That friend that you left behind, cant blame you" So i believe , he is his friend who fell head over heel since the start...

idk what to think since some evidence points to hwon being the childhood friend
in chapter 22 (near the end), childhood friend said "want me to beat the crap outta them, pull out all their hair and teeth, and make them shit blood?" because people have been bullying woojin. woojin replies with "wha? you planning on becoming a ganster?"
after arguing back and forth, woojin says he doesn't have a phone and asks childhood friend how he would find him. childhood friend says "i'll follow you without anyone knowing."
as of ch 24, we know that hwon is in a mob and when woojin sleeps with other people, he beats them up and takes their teeth to show woojin. whenever woojin runs away, hwon would always find him somehow. he always know where woojin is and who he's with. IT CAN'T BE A COINCIDENCE
so... Hwon is the Hoody guy?