Guest Stars Oh Ji Yul as Ha Ye Sol Lee Hae Young as Shin Young Joon Yoon Da Kyung as Hong Young Ae Son Sook as Landlady Jung Ji So as Teen Dong Eun Seo Woo Hyuk as Teen Myung Oh Jun Soo Ah as Sung Han's School's Nurse Heo Dong Won as Choo Jung Ho Lee Byung Joon as Lee Gil Sung Song Ji Woo as Teen Hye Jung Jo Min Wook as Kim Jung Hun Kim Seung Hwa as Flight Attendant Park Sul Ha as Seung Ah Lee Jung In as Psychiatrist Kim Jin as Yeo Jung's Patient Min Eung Shik as Principal Kim Shi Kook as Jae Joon's Employee Kim Seo Kyung as Ye Sol's Nanny