The Girl With The Breast Milk Vaccine: Min-yeong used to have a crush on Ji-hoon. However, Ji-hoon sees a picture of Min-yeong's friend, Na-hee, and begins to ask to be introduced. Min-yeong eventually introduced the two. By the time the relationship between the two matures, Min-yeong continues to regret and visits Ji-hoon to confess her feelings. Ji-hoon, who is quick-witted, accepts Min-yeong. The love story of two friends surrounding a man is just beginning.