in the earlier chapters he did say he wanted to get along well with rosa so that he, rosa and rosa's mom can be family
but yea its too bad for yeonwu because rosa is a bit twisted. she wants yeonwu but cant have him cause she is her mom's property and she did say she is the type who wants to break stuffs that she likes. Yeonwu didn't do anything wrong...it just sucks to be him that he is now entangled with both mother and daughter.

Genuinely confused what he did so wrong? To ended up getting raped? Never once he said he wanted to be a family for Rosa? He strongly denied when Rosa treated her like a fucking slave and slut. Rosa has no business ruining someone who just wanted a place where he can stand in.
There's no excusing her, any no with absolute no consent, is rape. We wouldn't like this if Rosa was getting violated, it'll turn the comments section up side down.
Simply because everyone finds him pretty that you're not reacting much to such violence.