Yuurei to Tsukareta Kaishain

One day, a ghost who remained in this world with lingering attachments encountered Nozaki, an office worker left exhausted from work. "Nobody even looks at me..." Nozaki was consumed with loneliness. The ghost, who was all alone at the end of his own life, decided to watch over his daily life. Though left at the mercy of his job, Nozaki desperately carried on each day. Until one day, he encountered someone new. Through connecting with others, Nozaki will gradually take back the feelings he lost amid the restless day-to-day. (Source: Kadokawa, translated)