Kiyosumi (KAWANISHI Takumi) is an inconspicuous loner who produces electronic music in his bedroom solely for himself, reticent to share it with the world. But everything changes when his neighbor Ushio (SAKURADA Hiyori) hears his music through the walls. She approaches him and records a video of him performing then uploads it online—sparking new opportunities and a new romance. The unforgettable soundtrack was created by Yaffle, a music producer for the Japanese pop star Fujii Kaze and others, whose credits include a variety of other film scores as well.