Cha Mi-rae is a doctor and single mother to her young daughter Sa-rang. When she gets diagnosed with terminal cancer and told she has one year left to live, she seeks out her ex-boyfriend Han Yeol, a former baseball player. Mi-rae and Yeol were a couple a decade ago, but she broke up with him to study abroad and because she didn't think much of his prospects. Soon after, a serious injury forced him to retire from the sport, and Yeol became the rehabilitation coach of a major league baseball team. Mi-rae is determined to transform still-single, grungy, irritable Yeol into the best father possible for her daughter.
Top Billed Cast
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Lee Dong-gun
Han Yeol (16 episodes)

Lee Re
Cha Sa-rang (16 episodes)

Seo Jun-young
Shin Woo-hyuk (16 episodes)

Seo Yea-ji
Hwang Ji-hye (16 episodes)

Kang Nam-gil
Han Man-ho (16 episodes)

Lee Han-wi
Choi Nak-kwon (16 episodes)

Jang Gwang
Coach Bang (16 episodes)

Lee Yu-ri
Cha Mi-rae (16 episodes)

Choi Shang
Ryu Hyun-Woo (16 episodes)