
we don't know who the guy with no face is yet, he's the og Sihyeon's sponsor/lover/pimp, Whomever it is, they're are trash.
og Sihyeon had debt (most from his sister being in the hospital) before he died so our Sihyeon took it over and went to his old gang with a proposal but Daejun did even more and paid it all off.
Chin scar and high school friend (Daejun) is the same person (maybe you mean the actor, they do look alike), our Sihyeon is just lying about the high school friend thing to his members cause he's not og Sihyeon.

OG Sihyeon had a lover he thought that loved him. But he was a bastard and took Sihyeon for granted. A prevent that wanted Sihyeon so dependent on him and deep in the abyss that he would never come out of it without him. He manipulated Sihyeon soo much that even living became painful for him, but his sister was in the hospital so he couldn't kill himself. He was diagnosed with paranoia and other psychological disorders because of him. He was in despair, with a large debt from an illegal loan shark when the accident happened.
The guy with chin scar is the second hand of Hajin (current soul in Sihyeon's body) who was a loan shark. He's in love with Hajin.
His high school friend is the one Sihyeon was in love with. They were lovers since school and because Sihyeon is so beautiful the bastard lured him into the industry. He was so in love that he would do anything for him.
I'm on chapter 26 but I'm so lost rn can someone explain it to me pls