本片是一部韩国剧情片，上映于2020-07-02，由Lee Dong·Joon导演，由泰熙/Lee Mi·na/钟仁主演。
剧情简介：Bo-ram and Hyeon-woo are friends in the neighborhood that I knew since I was young. The two, who were just like children, became adults and began to love each other. Bo-ram prefers a lighter love rather than a more serious one, and Hyun-woo likes only one woman... Hyeon-woo gets help from Bo-ram in many ways to win his favorite Seo-yeon. And as a friend, Bo-ram starts a special class for Hyeon-woo... In the midst of this, Hyeon-woo realizes that his true love is not Seo-yeon but Bo-ram, and he struggles to choose between friendship and love. This is how people in their 20s start their own unpredictable love story.
外文名：가슴 큰 여동생
类型：剧情 / 爱情
地区：韩国
导演：Lee Dong·Joon
演员：泰熙 / Lee Mi·na / 钟仁 / Chul Jin
