Guest Stars Kim Sang Ho as Cha Gi Ho Lee Hak Joo as Jung Tae Joo Chang Ryul as Do Gang Jae Yoon Kyung Ho as Yoon Dong Hoon Kim Byung Chul as Jo Jin Sae Ahn Bok Ja as Convenience Store Owner Kim Soo Ha as Young Ji Woo Kim Bi Bi as Homeroom Teacher Kim Jung Woo as Detective Song Young Joo as Bully Cha Ji Hyun as Thug Noreen Joyce Guerra as Student