A slutty gal from Tokyo transfers to a rural school! Until then, the shy girls had nothing to do with sex, but they get some naughty advice from the slutty gal, and as the days go by, their appearances and personalities change drastically! A simple and serious country girl who was turned off by even a little dirty joke awakens her slut side under the influence of a single transfer student... Now that I'm the only dick nearby, I'm super busy dealing with them! Of course, I also have to satisfy the slutty gal's sexual desires!