Kim Bok-joo (played by Lee Kyung-kyung), a 21-year-old student of the weightlifting department of the National Sports University, is a girl who strives to run towards her dreams and goals. Although she looks very rash, she has a soft glass heart.By chance, she meets Jung Joon Hyung (Nam Joo Hyuk), a male classmate from the swimming club at the same school, an unlucky swimming genius, and a romantic first love story unfolds.