Guest Stars Ryu Abel as Han Yu Na Yoon Hyun Soo as Choi Yul Cho Jin Se as Song Woo Taek Song Young A as Cheon Song Yi Lee Seo El as Yoon Chae A Yoo Seung Mok as Vice Principal Kim Yi Kyung as Min Ji A Kim Yi Kyung as Han Cho Young Lee Hyun Woo as Mountain God Cha Eun Woo as Soo Hyun