Part 4 - After a diaper change and a diaper cover to keep everything dry is on, she goes off to study with her study partner. However her incontinence gets the better of her,
peeing in her diapers she feels humiliated and runs away. She returns to the doctor for a diaper since the only one she had is wet. The doctor hands her a diaper and asks her to go change into it and wear a diaper.
Now diapered and wearing the diaper under her school uniform, the doctors asks her to lift her skirt up so he can see her wearing the diaper. Things heat up and they both have sex in a diaper.