BanG Dream!: Star Beat

Toyama Kasumi is a quiet high school freshman who stopped singing and expressing her feelings after being mocked for performing a song she loved. She struggles to connect with others and finds solace in writing to an anonymous classmate named "Saaya" through an exchange diary. Saaya appears in class at regular intervals. One day, Kasumi follows star-shaped stickers to a pawnshop, where she discovers a star-shaped guitar called "Random Star." Inspired, she decides to pursue her dreams. At the shop, she meets Ichigaya Arisa, who offers Kasumi the guitar in return for joining her game titled "BanG_Dream!"