I belong to the lowest-ranked group in class. Even so, there's a girl I admire: Rio-san. She has a boyfriend, Akira-kun, who is part of the highest-ranked group. Akira-kun is a nice guy who is even kind to us low-rankers. After school, we were gathered at Sato-kun's house, our usual hangout, when Akira-kun showed up with Rio-san. Then, Akira-kun said something shocking to us: "Hey, do you guys want to see Rio's pussy?"