i thought about that too, but some women have a clear adams apple too so might be the case?
Spoiler about this
From a spoiler, the novel reader said that ml knows mc is a boy from the very starttt ε=ε=(ノ≧∇≦)ノ
noice
HELL YEAH
Not really from the start. He started to have suspicions when he was already having interest in him. Btw, in here the hint here is that you will notice little by little Hakyung is getting manlier and manlier while dressed as Jiyoung.
OOO wow thats such a neat detail
Aaahhh I love them bothhhh !!! Thank you for correcting me ε=ε=(ノ≧∇≦)ノ
aside from that, Yoonsung really didn't notice his Adam's apple? Like that is oretty noticeable when they drank beside each other don't you think?