Kim MiHye, is a bespectacled 20 year old MBA student who is quite pessimistic and cynical about her life and relationship. She befriend with D.O which is her classmate and Hyun Hee which is her also neighbor. She then met Chanyeol, a carefree man who shift to MiHye's neighbourhood with his mother to live with his uncle. Noticing a gloom and sadness from his new neighbors, and the beauty of MiHye, he intervene and tries to know MiHyebetter.