Ookami Otoko to Norainu Otoko

A gloomy young man, Furukami Taira is actually a werewolf. He lives a quiet life, feels insecure about being a werewolf, and does not have any friends. One day, he is approached by a neighbor in the hallway of his apartment building, but the neighbor's behavior is somewhat "un-human"...?

(Source: Kadokawa, translated)