Gang no Kaikata

Overview

One night, just as he was leaving work, Sugimori Yuu ends up meeting a very aggressive-looking foreigner going by the name Clyde. When he finds himself being threatened by a gun, Yuu has no option but to follow Clyde’s instructions, so he takes him to his own house. After a short talk, they come to the conclusion that Clyde “traveled in time”. From then on, Yuu really doesn’t care if it’s true or not: he offers him money and food in exchange for sparing his life. But Clyde…

Source: AniList