Y/N's life takes an unexpected turn when she's evicted from her apartment, leaving her with no choice but to move in with her brother, Hongjoong, and his bandmates in the popular K-pop group ATEEZ. She's not a fan of the group and has little interest in their glamorous world, but her dire situation forces her to make this drastic change. Living under one roof with ATEEZ is anything but easy, especially when it comes to San. From the moment they meet, their clashing personalities and conflicting views set the stage for tension and friction. What starts as a rivalry filled with misunderstandings and arguments slowly evolves into something deeper.