Reina Miyashita, a slender and beautiful girl, is incontinent and has an oil massage to develop her portio.

This AV film tells the story of a female student from the track and field club who was supposed to receive a massage, but ends up being exposed to aphrodisiac oil at a corrupt massage parlor which causes her sensitivity to skyrocket. Her innocent G-spot is thoroughly developed leading to multiple instances of squirting and unintentional urination, reaching a climax of incontinence. The film portrays the growth of a teenage girl's vagina being intensively stimulated, showing her contorting in pleasure from vigorous thrusts, creating an atmosphere of tension and excitement.