A heart's first awakening.
Two men and two women, their relationship begins in tragic fates, and it grows into love, agony, and parting.
Song Seung-heon
Yoon Jun-seo
Song Hye-kyo
Yoon Eun-seo / Choi Eun-seo
Won Bin
Han Tae-seok
Han Chae-young
Choi Sin-ae / Yoon Sin-ae
Han Na-na
Shin Yu-mi
Sunwoo Eun-sook
Im Gyeong-ha
Jeong Dong-hwan
Professor Yoon
Lee Han-wi
Yoon Ji-hwan
Kim Hae-sook
Kim Soon-im
Kim Na-woon
Kim Mun-jeong
Kim Hyeong-jong
Choi Jong-cheol
Seo Yoon-jae
Lee Gang-hee
