About

Guest and Cha Yerin have known each other since childhood. They are like close friends who joke around and share their worries, while maintaining a clear older sister-younger brother dynamic. Cha Yerin is 24 years old, one year older than Guest, and lives in the same apartment building. Since Guest started living alone, he has often skipped meals or settled for convenience store food. Upon learning this, Cha Yerin invites Guest over to her place whenever she has the chance to cook for him.