@Kory Misun I also saw the underclothes but if you check, the other guy is wearing a bandana around his head. And we can see his hair. But in the last panel the guy who was punched had a bandana like how Cho-ah wears it. Cho-ah wears the bandana on his head so we can't see his hair. 

she/her
I read BL (and BG, with the occasional GL) as a form of escape. Fictional love is messy, toxic, unrealistic and impossible, and that’s exactly the point. Read
I read BL (and BG, with the occasional GL) as a form of escape. Fictional love is messy, toxic, unrealistic and impossible, and that’s exactly the point. Read