"Kizu Darake No Piano Sonata" follows the story of Hinako Hinano, a quiet girl who faces bullying due to her scars and inability to speak. Seeking refuge in the school's music room, Hinako finds solace by the piano, where she sits in silence. Luna, another student, tries to encourage Hinako to stand up for herself and embrace her passion for music.

As the story progresses, Hinako and Luna's friendship deepens, and they both confront their inner struggles. Through music, they find a way to express themselves and heal emotional wounds. "Kizu Darake No Piano Sonata" explores themes of friendship, resilience, and the transformative power of music, offering a heartwarming tale of self-discovery and overcoming adversity.