[1][2] Based on the same-titled Daum webtoon by Lee Sang-hoon and Jin Hyo-mi,[3] it aired on tvN from March 13 to May 2, 2015 on Fridays and Saturdays at 20:30 for 16 episodes.

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.