Do-gi goes undercover as a high school substitute teacher after receiving a call for help from a student who is being severely bullied.
Genres: Action & Adventure , Crime , Drama
Keywords: antihero , based-on-webcomic-or-webtoon , disguise , injustice , investigation , revenge , secret-organization , taxi , vigilante , watch-TV-series-online-free , watch-Korean-drama-online , anti-hero , awestruck