気になってる人が男じゃなかった [Ki ni Natteru Hito ga Otoko Janakatta] Series by Sumiko Arai, 新井 すみこ

Fashionable and upbeat high schooler Aya falls head over heels for an employee at a local CD shop. He’s got an air of mystery about him, always dressed well, and has impeccable taste in music. Little does she know—this supposedly male employee is actually her female classmate Mitsuki! Mitsuki generally keeps to herself, but since her seat is right next to Aya’s, she can't help but be extremely aware of the other’s crush... moreFashionable and upbeat high schooler Aya falls head over heels for an employee at a local CD shop. He’s got an air of mystery about him, always dressed well, and has impeccable taste in music. Little does she know—this supposedly male employee is actually her female classmate Mitsuki! Mitsuki generally keeps to herself, but since her seat is right next to Aya’s, she can't help but be extremely aware of the other’s crush. Revealing the truth is out of the question—but perhaps getting closer to Aya wouldn’t be so bad... less

Aya’s found out that the guy she was interested in isn’t a guy at all—and she’s also realized that she just can’t keep her cool around Mitsuki! The two haven’t quite put a name on their complex, earnest feelings, but they only grow as the pair continues to bond over the music they love. With their senior year at hand, future plans are coming into question…and Aya’s thrown for a loop when a mysterious woman shows up and wants Mitsuki to go overseas!

With Aya’s encouragement and inspiration from a music festival they attend together, Mitsuki begins to pursue her passion for music in earnest! But when a certain video of her singing goes viral on social media, Mitsuki ends up becoming somewhat of a celebrity at school—and her newfound fame brings difficulties for both her and Aya...