Tanzawa Sudachi ga Koko ni Iru! Tanzawa Sudachi is right here!

Synopsis

When Daisuke entered high school, he found himself sitting next to a rapper! Her name is Sudachi Tanzawa, and while she looked intimidating at first, she's actually has a communication disorder. Thus begins Daisuke's days of worrying about this shy hip-hop girl. (Source: Kodansha, translated)