This oneshot was fun to read but sadly the ending was pretty obvious, he started thinking she was just a normal girl near the end even though in the beginning we got to know about the wiretapping, gps tracking and knife-wielding, so it was clear that there was something wrong
It'd be funny if now that he realized he wasn't the bad guy he'd just peacefully pass on instead of lingering in the world, that'd make for a great ending gag