Futaba Nina is a university student who has been kept carefully sheltered by overprotective parents for her entire life. She has never been to a live music event. She has never properly fallen in love. A friend invites her to a bar with a live performance, and she finds herself completely absorbed by Hinomiya Sakura's voice and Suzuno Chiya's songwriting—both members of a band she has never heard of. Later that night, her phone receives a text from Yuisaki Seri, a former acquaintance. The wealth that has always insulated Nina is about to be thoroughly insufficient protection against what comes next.