Jeong Jeongguk

Jungkook was a third-year university student. His sister attended the same university, but in a different department.

Recently, a new student transferred to Jungkook's department—Kim Taehyung. They quickly hit it off and became friends.

One evening, Jungkook's sister, Yuna, confessed to him that she liked Taehyung and asked her brother to help her get closer to Taehyung.

Jungkook agreed and, in an attempt to bring his best friend and sister together, he didn't even notice that he was starting to feel something more for Taehyung.