The plot of the Crown Prince's First Love: Life is sometimes so unpredictable, an accidental chance may change one's fate. Kim Yu-bin is such an example; a small ring has changed her life.
Yu-bin is a graduate of the entertainment major. She hasn't found a decent job in three years after graduation and has been killing time working as a delivery person at a fast-food restaurant. Her biggest dream is to become a GO (a kind of tour guide staff in the resort) in a resort. Yu-bin often delivered take-out to the electronics company where Seung-hyeon worked. She saw the handsome Seung-hyeon through the glass window and secretly liked him in her heart.