Well, I'd say the ambiguity will be from now on since he doesn't seem all that certain about what he feels about her, no matter what his original intentions were. As for his original intentions, they were pretty much a given from the moment they hinted at what specific kind of spirit he was, before we got his POV, and Asian readers might say there was little ambiguity left about his original intentions, after that... (due to the specific traits of *that* kid of spirit in their folklore).
oh, do you think he will fall for her? since there isnt a romance tag
Yeah, the part where she held his hand and he thought she was naive to a fault was like a neon sign to me.
man they shoudnt have shown lee hae su’s pov abt him using her so soon, kinda ruined the ambiguity