Guest Stars Jung So Min as Jang Soon Duk Lee Dong Hwi as Kim Tae Nam Jo Young Jin as Assistant Principal Park Hoon as Yo Won Park Se Wan as Sook Hee Lee Jae Kyun as Officer Kim Lee Chae Eun as Park Joo Young Jun Soo Ji as Madam Chae Lee Yoo Joon as Seo Yong Soo Lee Min Young as Mi Ja