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Jeong Yoojin is your regular "Little Miss Tardy" who too often finds herself in trouble for her lateness. Today seems no different and once again it is another rush to school for Yoojin with her childhood friend; Kim Sanghyeok. Unbeknownst to her, this day is different. Fate intervenes as she makes the acquaintance of a mysterious new student.
Bae Yong-jun
Kang Joon-sang
Choi Ji-woo
Jeong Yoo-jin
Park Yong-ha
Kim Sang-hyeok
Park Sol-mi
Oh Chae-rin
Lee Hae-eun
Gong Jin-sook
Ryu Seung-su
Kwon Yong-gook
Song Ok-suk
Kang Mi-hee
Jeong Dong-hwan
Professor Kim Jin-woo
Kim Hae-sook
Yoo-jin's Mother
Jang Hang-seon
Supervisor Kim
Jung Won-joong
Teacher Park Jeong-o
Ha Jae-yeong
Jeong Hyeon-soo
Lee Hyo-choon
Sang-hyeok's Mother