Only One 2 ~Naomi Ai no Inori ga Todoku Toki~

Main character starts to date Naomi girl. After one trivial fight he runs away on a motorcycle in an unstable mental state and loses consciousness as a result of a traffic accident. His spirit leaves the body, but shinigami can't capture it unless Naomi strong love link is cut. Protagonist makes a deal with the Grim Reaper to revive just in order to spoil Naomi's memories thus breaking her free from the past relations. The days of Naomi's humiliation begin.

[From vndbreview]