The first OVA adaptation of Morita-san wa Mukuchi is created by Studio Gram, based on Tae Sano's comedy / slice-of-life 4-koma manga of the same title. The original story follows the everyday life of Mayu Morita, a girl who is exceedingly gentle and thoughtful, to the point that she does not say much of anything to anyone in high school. (based on ANN synopsis)