Yuka is a lesbian doctor working at a gynecological clinic. One day, a new patient named Mayu comes in for an initial consultation due to irregular menstruation. Sensing Mayu's lack of sexual knowledge, Yuka takes advantage of the examination as an excuse to tease and play with her young, luscious body. Mayu, whose relationship with her boyfriend has recently fallen apart, is physically starved for intimacy. Through her first experience, Yuka's persistent and intense cunnilingus overwhelms Mayu's senses, bringing her to climax repeatedly.