Guest Stars Kim Joo Hun as Lee Sang In Park Jin Joo as Yoo Seung Jae Jang Gyu Ri as Sun Byul Kang Ki Doong as Jo Jae Soo Jang Young Nam as Park Haeng Ja Lee Eol as Go Dae Hwan Kim Soo In as Go Moon Young (Child) Moon Woo Jin as Moon Kang Tae (Child) Jung Ji Hyun as Publishing House Staff Ko Han Min as Publishing House Staff Kwon Ye Eun as Go Eun Kim Tae Hoon as Doctor Son Kang Gook as Kim Seung Chul Jo Shi Yun as Lee Seul Bi Yoo Seung Il as Angry Professor Bae Bo Ram as Myoung Ji Suk Min Young as Seul Bi's Mother Kim Jin as Nurse Kim Woo Kyum as Caregiver
