Still 17
양세종Gong Woo-Jin
Shin Hye-sunWoo Seo-Ri
Ahn Hyo-seopYoo Chan
예지원Jennifer
왕지원Kim Tae-Rin
정유진Kang Hee-Soo
윤선우Kim Hyeong-Tae
시은Woo Seo-Ri (young)
윤찬영Gong Woo-Jin (young)
안승균Jin-hyun
Jo Hyun-sikHan Duk-soo
이도현Dong Hae-Beom
Kim Min-Seo
Im Byeong-giGong Yong Hwan [Gong Woo Jin's father]
Park Hyun JungKim Tae-rin's Mother