The art is cool, the ML seems like a nice guy in those first interactions, but the FL is… nonsense? Like, the author serious could not but some thought in how they got to know each other… The guys is a hard worker… So… Make they know each other in a convenience store or anything like that, some interactions, anything… Really hoping here that she's someone famous like a singer, model, or anything like that, and they approach a little more of why would someone fall in love so fast with another person and how in the hell she knew he had a debt to pay.
Anyway, maybe I'm just trying to find a good romance and probably that will be more of a comedy ero manga.