剧情：《小姐姐》是属于伦理电影类型，官方公布的演员表主要是LeeJi-hyun-VI(이지현)SeoWon-I(서원)，官方公布的主要简介说的是A young man grows up with his older cousin who is like an older sister to him. When he grows up, he goes to visit her at her home where her friend is also visiting. The three of them under roof make for some interesting circumstances