Guy She Was Interested In Wasn't A Guy At All (Manga) Vol 03

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... Yen Press
(W/A) Sumiko Arai