Lured by a mysterious note into an empty music room, a high school girl named Nene opens the door to find a single pair of headphones waiting for her. These are not ordinary headphones but a luxurious, high-end audio device that has helped world-class musicians craft beautiful music. Curious, she puts them on and listens to her favorite song, and the experience sparks an intense fascination with the world of premium audio equipment. From that moment, Nene embarks on a journey to become a true headphone enthusiast, exploring the craftsmanship, technology, and culture behind Japan’s finest audio products. The story follows her everyday encounters with fellow audiophiles, visits to specialty shops, and the deepening of her own auditory sensitivity, all while the lingering question remains: who placed the headphones there for her, and why? Set in a realistic modern Japanese setting, the narrative blends slice-of-life moments with a genuine appreciation for the art of sound, highlighting how a single listening experience can transform a person’s perspective and ignite a passionate pursuit.