High School Mystery Club

It’s Mr. Dokgo (1x13)

Air date: Mar 12, 2021

The girls return to school on their last day. As soon as they enter the school, they find Mr. Dokgo’s janitor room open with a shovel lying in front of it. They find the scene quite odd and enter his room. While rummaging the room, they find out about a crucial story behind Mr. Dokgo becoming the school’s janitor.