Shinrei Tantei Yakumo

Shinrei Tantei Yakumo tells a story about a college student, Saitou Yakumo who is born with different eye colors. His red left eye gives him a special ability to see ghosts and spirits. He believes ghosts and spirits are bound to earth because of a certain "cause," and simply eliminating that "cause" will let those spirits rest in peace. Being asked for help by Ozawa Haruka, they begin the investigation together.

(Source: Fateful Encounters)