Who’s the red long hair guy?

i think it's the dude who tried to take advantage of taesung in szn 4 (not sure tho lmao havent read this for years)

You mean that working person in hs group? In season 4 did he had not black hair oh they did share a room together over the weekend when the Boss said take haebom cause he can drive?

Sorry i just re checked it chapter 124 was a red hair but its not him cause the eye color is different.