Gyun-woo is having difficulty forgetting the sassy girl. He then reunites with his childhood sweetheart, an elementary school classmate from China who was often teased about her broken Korean. They marry despite family opposition, and Gyun-woo has no idea what marriage has in store for him.

A young man meets a sassy and unconventional girl on the subway and his life takes a chaotic turn as he falls in love with her. Their relationship is filled with drunken escapades, coincidences, and magical thinking, bringing both joy and dysfunction. As their story unfolds, they navigate through various situations such as a time capsule, puppy love, and a dysfunctional relationship. Will their love withstand the challenges?