One day, a common office worker, Hinano, develops a disease that causes her breasts and hips to grow when she gets wet by water. Her body only goes back to normal if she reaches an orgasm. But her breast will get bigger if she touches water again. Because of this disease, she gets erotic problems everywhere...!? She's molested on the train and experiences naughty things at the office...even her boss gets involved......It's full of erotic scenes!