Kare to Obake To Renai Shousetsuka

Maeda Jun is a romance novelist who is at heart a gloomy misthantrope who loves the stroll through the local graveyard at night. One night as he ruminates over his writing struggles, he catches the attention of a terrifying (?) spirit!

Kawakami Yukio is a delivery man with the ability to see ghosts. He happens to catch sight of Maeda's ghostly affliction but figures there is nothing he can do to help. Yet for whatever reason they keep meeting during the oddest of situations...

(Source: Pixiv Comic, translated)