Instead of Seo-won's memories, Hae-na's memories of him get erased, making Seo-won despair. Seo-won does his best to win Hae-na's heart again, but it doesn't go as well as he expected. However, Seo-won finds out that Ji-a still has memories of him and Hae-na dating. Meanwhile, Ji-a visits the mountain she died in her past life, which upsets Bo-gyeom.
Park Gyu-young
Han Hae-na
Cha Eun-woo
Jin Seo-won
Lee Hyun-woo
Lee Bo-gyeom
Yoon Hyun-soo
Choi Yul
Kim Yi-kyeong
Min Ji-a
Ryu Abel
Han Yu-na
Cho Jin-se
Song Woo-taek
Lee Seo-el
Yoon Chae-a
Song Young-ah
Cheon Song-yi
Jung Young-ju
Shin Mi-seon
Kim Hong-pyo
Han Pan-dong
Jo Ah-young
Song Da-eun
Kang Soo-bin
Kwon Ri-ae
Kim Min-ji
Chu So-yeon
Shin Jun-hang
Jo Jun-seo
Yoo Seung-mok
Vice Principal
Kim Min-seok
Kang Eun-hwan
Kim Hae-jun
Uncle Dong-chul
Lee Seung-joon
Oh Sang-soo