Girls' F1st!!!! GT

Overview

Although she admires the rock bands she saw as a child, Yoshino Nakagawa is too shy to sing in front of others. Her classmate Futaba Shirase sees her singing secretly in a toilet stall and invites her to form a band together. The story begins when this happens. Luna Fujimori quits the light music club to join the band, wanting to see the friendship between the two up close, and Kanae Sakanoshita is invited to play the guitar just to make up the numbers, but as she starts playing it, she falls in love with it. This is a story of youth and friendship spun by these unique members. (Source: Natalie, translated)

Source: AniList