I think they mean the sub/dom role in which they did switch.
The artist specifically drew the word top and bottom under their faces, there is no switch
Please read my first reply again. I didn’t say they swap their top/bottom role. you might need to check all the existing chapters in Korean raw. they did in fact switch but only sub/dom in bdsm play, not top/bottom position (i stated that very clearly up there).
Grey hair was a dom bottom at first (chapter 5). later on in chapter 17, he becomes a sub bottom. The two of them switch it back and forth continuously.
and what do you mean by “The artist specifically drew the word top and bottom under their faces”?
Grey hair is the bottom and black hair is the top. Author already confirmed and there is 100% no switch