Grim Reaper and Four Girlfriends (manga)

Kaoru Minaguchi is a no-lifer who sucks at school, can't play sports, lacks any real talent, definitely doesn't have a girlfriend, or even a remote desire to change his ways...until a certain grim reaper pays him a visit. Turns out, she's a reaper of no-lifers and if Kaoru can't find a way to become a true real-lifer, he's as good as dead...!