@Zubrul I'm pretty sure it's mentioned that he had been told but he just didn't notice since he was too into his research. The reason people bash MC is because running away is pretty cowardly, he could just tell them straight up that he won't marry her and then leave because running away makes...
@Madotsuki Damn, pretty sure it ain’t like that. What I got from her was that basically she imitated the brother’s manly ways which caused her to become that way.