What is baby sister in Korea?

In Korea, a baby sister is commonly referred to as "막내 여동생" (maknae yeodongsaeng), meaning the youngest sister. The term "막내" (maknae) is used to denote the youngest sibling in a family. Additionally, the Word "여동생" (yeodongsaeng) specifically refers to a younger sister. This concept is significant in Korean culture, as family hierarchy and age play important roles in social interactions.