This article deals with the practices of the chorus classes under COVID-19 at Miyagi University of Education in the first semester 2020. We tried to have online classes from May, and then gradually restarted face-to-face learning from the end of June. In the chorus classes, the students were divided into three groups, and participated online and face-to-face learning by rotation. At first the chorus classes centered on listening to music online, but after in-classroom classes were allowed partially, not only the face-to-face but also the online members came to the realization that they were taking part in the class. I describe below the details of the educational process and the students' activities.