I think he does but honestly it was so vague about it I’m not so sure
He doesn't lol, his face was really funny when he found out.
The duke already knows. He slightly felt her breasts when they were in the lake, when he saved Rino from a wild animal. She was bathing there and wasn't able to wear her bandages. That's why the duke, after realising she's a girl, offered his private bath to her. Then he saw her naked back as well.
omo! Did you read the raws?!! Im so excited with plot twists/gender benders like this cause ML just accepts they're gay when they really arent. ╮(￣▽￣)╭
I wouldn't call it reading rather assuming? since I cant read Korean lol,
but it looks like it? she took off her bandage right in front of him and made him touch her boobs then his face went like Σ( ￣□￣||).
Does he still not know that she's a girl?????