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. 

Her admiration for the older girl was something she couldn't understand or explain. But when she knew that Sana's heart is already taken; she finally realized that what she felt towards the girl was not just a mere crush but was already something that could be love. 

Tzuyu was torn between holding on and letting go. In the midst of her journey in life, music was always there to strengthen her through her hardships. As she experiences the hardships in life, she then discovers a lot of things along the way.