Not tryna be rude, but girl, are we reading the same manhwa cuz wdym???? Lolll, he has do surpress his musculinity cause he has to, not cause he want to + in the earlier chapter it was revealed that he is doing this and training so he can defeat his stepfather (=・ω・=)
AND ALSO, it wouldnt be considered a Yaoi/BL manhwa if one of them is a girl/transisioning(Ik i fumbled that spelling, plez dont come for me) into a girl, in mangago, the tag would be 'gender bender' or just 'romance'
So she consume harsh toxic to suprass her puberty so that makes her a trans woman? Woahh! First ever trans story I've read