Copied from Jheya's comment
-Trying to gaslight/manipulate the hell out of Michelle about their marriage because Michelle is confused and hesitating about it since Ain disguised himself as a servant.
-He had been feeding Michelle sedatives for the ENTIRE month they had been staying at Sherleg Mansion.
-He made his servants report everything about Michelle's activities. In short "stalker'.
-When he was planning to visit Michelle, he told his head maid to increase the dosage of the sedatives since Michelle might have developed a tolerance.
-Noncon Michelle while he was sleeping. Touched him and gave him bj.
He is actually manipulative even towards his own sister. Personally, he gives some sociopath vibes.

Goodness me, the spoilers I’ve just read left me speechless, even so i can’t help but want to keep reading… also the art keeps on improving