I watched this within the last fixe years, I think on Netflix. We get introduced to a hitman who is extremely talented, able to take down multiple targets without getting injured, and dodging shots before they're fired. Due to a combination of his talent and success rate, either he picks and chooses which contracts he takes, or he's simply freelancing. Either way, I remember his fees often being comically low. There are two plotlines going one. First, for some reason, he's being targeted by other killers during the movie, something he doesn't take seriously at all. Secondly, he meets a girl. I don't remember if it's a blind date, or a chance meeting, but he pursues her in something halfway in between clumsy but sincere nice guy and overly persistent Nice Guy.
What pushes this film into sci-fi for me is that he describes his talent as something extra, some sort of a oneness with the universe such that he knows exactly what to do to complete a task, and when he meets the girl, she has the exact same skill, something which he proves by throwing knives at her and she automatically catches or juggles them, kind of similar to how Merrick proved Buffy's skills in the Buffy the Vampire Slayer film. I think that the ultimate resolution of the film is that she accepts that her skills make her an excellent assassin as well, and so they become a team both romantically and professionally.
Other than the knife juggling scenes, the only other ones that jump out at me was a scene outside of a bar where he took down a knife-wielding opponent (I think from a former employer unhappy with him?) with light talk in between attacks, I think about having met the girl, and a scene where he and the girl are in a park, and he starts "dancing" with her, foiling the shots of a sniper in the park.