Guest Stars Choi Jae Sung as Mao Liwarat Sung Ji Roo as Byun Dong Suk Jung Sung Mo as Seo Young Gil Choi Ji Ho as Giraffe Lee Tae Sung as Kwon Sang Shik Lee Ki Young as Kang Joon Ho Park Gun Tae as Young Soo Hyun Jung Min Ah as Young Ji Woo Lee Do Ryun as Sir Jang Kim Jung Nan as Yoo Kyung Hwa Hong Choong Min as Hye Sun