Kasumi, who has been working at a junior high school in Setagaya Ward since graduating from university, finds that being a teacher is busier than she imagined, leaving her with few opportunities to meet people. This daily routine gradually leads to stress, and for a young woman, this stress can naturally translate to pent-up sexual desire. Having moved to Tokyo for higher education, she relied on a scholarship, but her teaching job alone isn't enough to repay it, leaving her struggling to pay it off...