志乃ちゃんは自分の名前が言えない (2018)

Ooshima Shino is a 1st-grade high school student. She has difficulties pronouncing words that start with vowels in front of people. Because of her speech impediment, she does not get along with others. Shino meets Kayo who likes music, but she is tone-deaf. They decide to start a band and Shino begins to change.