A nurse, Satomi, is told to help a sex counselor, Shinichi Nishijima with his study. She is not sure what exactly to do, but finds out that she is a test subject of sexual examinations!

Yumi is a nurse that works at Kannagi Hospital. She spends her days pining over the hospital director, until one day, she's invited by a co-worker to a group blind date, and her normal days get flipped upside...

The doctor examining her you-know-what is... a childhood friend of hers!? He spreads her legs wide open, and his fingers make their way deep inside... She can't contain her voice...! She's been bad with men...