
"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