18 year old Kira is just supposed to start her last year of high school at Yumkwang High School in Busan but due to unforeseen unfortunate events, she is forced to move out and stay with her auntie in Seoul. Now she has to finish high school in a different school, Seoul Music School. Her auntie rents out a boarding house close to the school and that’s where Kira is going to stay with 7 boys. There’s the vain leader called Zico, the silent, mysterious one call