Kyungsook had been living with her half-brother for the past few years. She wants to be an author, but it's not going so well, so she works at a restaurant to make up for it. Her friend is a popular rapper, going by the stage name of Suga, her half-brother is a solo artist by the name of Yeonseok. She kind of likes Taehyung, Jungkook knows he likes her, Taehyung isn't sure about his feelings, Jimin wants to marry her just because of her brother, and Suga wants her to be a sin