The Double Life of a Spy in a Fool's Mask: 'Secretly Greatly' on Kakao Webtoon

There is the sound of footsteps passing through the alley every night. The one who appears, dragging his slippers, is Bang Dong-goo, whom the neighborhood people call "Fool Hyung." He helps at the mart by distributing flyers, tidies up the convenience store at night, and supports drunk uncles back to their homes