Nonohara Yuzuka no Himitsu no Haishin

Yuzuka Nonohara occupies her days in an uncomfortable classroom, eating lunch in solitude. Her thoughts are preoccupied with the private sex streams she conducts from home. A discovery in her shoe locker initially appears to be a love letter. Upon opening it with hopeful anticipation, however, she finds it contains a screenshot from her stream accompanied by a written message.