So the ML in the beginning (Wonyoung; purple hair; gangster) was Rohee (White hair) from the very beginning (Ch 1). When Seongtae and Yising were watching the CCTV footage of the arson where Jintae rescued Yisin, in it, young Wongyoung and Rohee made a pact that resulted in them switching bodies.
Wonyoung wanted to get revenge for what the cult had put him through, but he can't do anything with that timid and young body he has, so he made a deal with Rohee, and they decided to switch bodies after that (Crazy that a kid was piloting an adult body indefinitely, but he eventually grew mentally with time). Rohee, on the other side, was growing as Wonyoung. After the calamity in chapter 54, Wonyoung has sought revenge and is now living in Rohee's body for god knows how long.
All in all, there were really only 2 male leads, who were also originally with Yisin during their captivity in the camp: Rohee (in Wonyoung's body) and Jintae (Deceased). I didn't really count Seungtae, Yeon, and Wonyoung. Seungtae was just a plot for Jintae's demise (He also just gave up too quickly at the end; so unlike him when he's presumed to cause Jintae's death just to own Yisin for himself), Yeon was a cuck, and Wonyoung had his own goals that can be another story of itself
So the ML in the beginning (Wonyoung; purple hair; gangster) was Rohee (White hair) from the very beginning (Ch 1). When Seongtae and Yising were watching the CCTV footage of the arson where Jintae rescued Yisin, in it, young Wongyoung and Rohee made a pact that resulted in them switching bodies.
Wonyoung wanted to get revenge for what the cult had put him through, but he can't do anything with that timid and young body he has, so he made a deal with Rohee, and they decided to switch bodies after that (Crazy that a kid was piloting an adult body indefinitely, but he eventually grew mentally with time). Rohee, on the other side, was growing as Wonyoung. After the calamity in chapter 54, Wonyoung has sought revenge and is now living in Rohee's body for god knows how long.
All in all, there were really only 2 male leads, who were also originally with Yisin during their captivity in the camp: Rohee (in Wonyoung's body) and Jintae (Deceased). I didn't really count Seungtae, Yeon, and Wonyoung. Seungtae was just a plot for Jintae's demise (He also just gave up too quickly at the end; so unlike him when he's presumed to cause Jintae's death just to own Yisin for himself), Yeon was a cuck, and Wonyoung had his own goals that can be another story of itself