Chou Tzuyu, a 17-year-old Tawainese girl who moved in South Korea to pursue her dreams as a musician while being away with her parents who are living in Taiwan, have always admired her friend, Minatozaki Sana, an 18-year-old Japanese girl who moved in South Korea to start a fresh beginning with her mother being a single parent and two older siblings. 

Moon Byul's life has never been better since she started to develop romantics feelings for her best friend, Solar. Meanwhile, Solar is completely unaware of it. Moon Byul is trying her best to shrug what she feels towards her best friend but what can she do if Solar is making her fall in love with her every second of everyday? She knows Solar likes somebody else and that somebody else is her cousin, Eric. Eric feels the same way t