Aya's convinced she's fallen for the coolest person alive: a mysteriously stylish CD shop employee, dressed all in black, with impeccable taste in music. She loves rock, though her friends don't share her interest. There's just one problem. That employee is actually Mitsuki, her quiet female classmate who sits directly beside her. Mitsuki keeps to herself at school, but she hears all about Aya's crush and agonizes over how to tell her the truth, too afraid to actually do it. Still, she keeps finding herself talking with Aya more and more, and a mutual love of music starts to bring the two girls closer in this music-filled romance.