Keunhyeongnimui Yugasajeong

Jae-In, a key figure in an illegal gang and a big brother, disappears after a decisive battle with the Yuksa. Four years later, YuNan, who followed Jae-In, reunites with his hyung... The relationship between the hyung who wears a hypermarket apron and the dongsaeng who doesn't seem serious?! Jae-In, who buried his past and walks the path of child-rearing, Yu-Nan, who had only chased his heart and obsession, and the hilarious Ron-Na, a cute little girl who has an unusual language ability.

(Source: Peanutoon, translated)