My Spring Days (Hangul: 내 생애 봄날; RR: Nae Saengae Bomnal; lit. "The Spring Days of My Life") is a 2014 South Korean television series starring Kam Woo-sung, Choi Sooyoung, Lee Joon-hyuk, and Jang Shin-young. It airs on MBC on Wednesdays and Thursdays at 21:55 for 16 episodes beginning September 10, 2014.The plot uses the concept of cellular memory, a medical hypothesis that recipients' personalities and habits become similar to their donors.