Shun Hayakawa is a young man in his sophomore year of university. He has one big problem... He cums too quickly! After mustering up all his courage, he visits a clinic that specializes in treating premature ejaculation. To his shock, the doctor turns out to be a total knockout babe with a huge chest...!! What's up with this doctor and her oddly erotic form of treatment...? Why does their relationship seem to escalate further each time he visits the clinic...? Will he truly be able to cure his premature ejaculation?!