ml was abandoned by her love interests and suddenly rescued by a man who lost his memory and who is the demon king. She noticed something weird with how the ml lead abandoned her so she decided to investigate not knowing her intelligence service was corrupted by the same person Grace. At the same time she wants to kick the ml out of her house cause of the risk of him killing people but actually he helps people -especially the ones from th sumps. She starts to fall in love with him, which also happens with the ml who still hasn't recoverd his memories. He is discovered by his demon servants in the body of some lord, so he manages to become a noble who can finally be with the ml. They toguether manage to uncover the plot behind the brainwashing theme in which black magic and a weird plant with demonic blood was used. So now, one ml the blue hair saint one is realized from it ands wants to have the same relationship with the mc, tho she is reclutant and just uses him cause of the holy water that can replace her healing magic (she may be cursed by the ml cause she killed him twice).
An Extra Stole the Male Leads