Wit's manga / #memory loss(4)

Juhyuk won't have sex with omegas because of his promised partner from his childhood (who he thinks died protecting him). So when his new body guard starts to remind him of his past love he is confused but decides to have his way with him (not very nicely at first). But this body guard has A LOT of secrets

In order to pay for his mother's medical bills, man pretends to be Jiyoung Han, a girl he knew when he was younger who has since died in a tragic accident. But a rich old man is looking for any relative of her grandmother, a woman he owes a debt to. So he agrees to this plot and it seems to be well, until the grandson shows up, and the grandfather wants him to get engaged to Jiyoung...

Seems good, will memory loss save this likely marriage of convenience? Not sure how the omega goes from being a dick to super sweet after losing his memories though, you'd think there wouldn't be that much of a personality switch