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Hee Woo goes back to living as a 21-year-old. He realizes that he can actually change the course of his life and does his best to live life to its fullest. Meanwhile, he keeps remembering events from his past life that he thought was unfortunate and changes their outcomes. Later on, Hee Woo goes back to being a law student.
Lee Joon-gi
Kim Hee-woo
Kim Ji-eun
Kim Hee-ah
Lee Kyung-young
Cho Tae-sub
Jung Sang-hoon
Lee Min-Soo
Cha Joo-young
Han Ji-Hyun
Kim Jae-kyung
Kim Han-Mi
Choi Gwang-il
Kim Seok-Hoon
Kim Hyeong-mook
Jang Il-Hyeon
Kim Jin-woo
Choi Kang-Jin
Park Cheol-min
Kim Chan-Sung
Kim Hee-jung
Lee Mi-Ok
Ji Chan
Park Sang-Man
Lee Soon-jae
Woo Yeong-Soo
Hyun Woo-Sung
Doctor K
Hyun Bong-sik
Park Dae-Ho
Yoo Dong-geun
Hwang Jin-Yong
Kim Yeong-hoon
Kim Jin-Woo
Lee Yeon-doo
Jung Seo-Yeon
Jeon Kuk-hwan
Kim Gun-Young
Lee Jae-woo
Kang Min-Seok
Cho Sung-won
Park Jin-hyuk
Hong Bi-ra
Kim Gyu Ri
Choi Shang
Lee Yeon-seok
Han Gi-chan
Kim Young-il
Jeon Seung-bin
Kim Yong-joon