One-Night Mistress...Convenient Wife

Three years ago, Natalie was treated like a child and dumped by Christo, a handsome lawyer, when she was working as a clerk at his law firm. She's grown up since first becoming infatuated with his kisses, and she thought she'd gotten over him-but now they're working together, and the two of them find themselves sharing a bed again. Just when Natalie is balking at the fact that the only requirement of their temporary relationship is that they won't ever get married, Christo makes a cruel request... He wants her to pretend to be his fiancee to please his dying grandmother.

(Source: Renta!)