Guest Stars Jo Woo Jin as Secretary Kim Park Kyung Hye as Ghost that follows Eun Tak Kim So Ra as Lee Jung Hwa Yum Hye Ran as Ji Yun Sook Go Bo Kyul as Class President Kim Sung Kyum as Yoo Shin Woo Jung Young Ki as Park Kyung Shik Choi Ri as Park Kyung Mi Kim Min Young as Soo Jin Kim Nan Hee as Eun Tak's Homeroom Teacher Hwang Suk Jung as Fortune Teller / Ghost Nam Da Reum as Kim Soo Bok