Symphony has been playing piano since she was 2, sitting on the piano chair and learning how to play twinkle twinkle little star. Now she is 17, one of the top piano prodigies in the world. Suga is a musical genius, but always does one thing, sleep. He sleeps wherever he goes, and only wakes up to playing complex piano pieces and compose new songs. He is cold to everyone including his parents for forcing him into the music world, and he is a perv with a very dirty mind. One day, Symphony hears Suga play Chopin's "Nocturne in C# minor" while sitting outside. Meet Symphony and Suga, as they go through their final year of high school and start a relationship that may hurt them both or change each other forever.