A mouth blame that never ends. Noa, who looks outstanding and is especially popular in the school, has a secret that she is secretly dating a boy student in the same class. After school, Noa is associated with his restraint play in an empty infirmary. ... But, in fact, the whole story was voyeurized, and the next day, he called the grade chief and was threatened by the video. Noa, who wants to avoid dropping out and is compliant with the grade chief, is required to do full-body lip service using only her mouth in a state of hand restraint.