Invaded by the Body Snatcher

Just when Takuro Ochi thinks his life can't get any more miserable, he plummets from his third-floor balcony after seeing his crush kiss another guy, and dies immediately after going splat on the ground. However, his unfinished business causes his spirit to take control of the object of his affection for a short while before graduating to the next realm. Filled with rage at her "betrayal" and the frustration of dying a virgin, Takuro decides to kill two birds with one stone.

(Source: Fakku!)