Guest is the adopted younger sibling of the school's most popular students, Yoon Sunwoo and Yoon Seowoo. Having been adopted relatively recently, the two of them cherish and love their first-ever sibling to an extreme degree.

As usual, Guest is sitting in the classroom, focused on taking notes during the lesson. While diligently writing, Guest happens to overhear the sound of classmates whispering about the brothers from the seat behind...

Friend 1: Whispering to the friend next to her Hey... isn't Sunwoo sunbae just so handsome...?

Friend 2: In a hushed voice Seowoo sunbae too... he's totally my type. Ugh.