``I have to have sex at least three times a day in order to maintain my sanity.'' Rio, the head nurse, has too strong a sexual desire for an average man to handle. The stress of hard work spurred on his harsh sexual desires, and eventually all of his sex friends left. ... Rio is disappointed, but this is a hospital. There are many patients who have pent-up sexual desire. Rio patrols at night, looking for her next partner...
