A handsome guy from a higher class group brings a creepy sex friend gal, who is grossly reluctant, to a room where the introverts of the class gather, like a haunted house.

I'm in the army at the lowest rank in my class. I also have a girl I admire. It's Rio. Her girlfriend has a boyfriend Akira, who is in the top ranked army. Akira-kun is a nice person who is kind to us, the lowest ranked army. After school, we were gathering as usual at Sato-kun's house, which we hide, and Akira-kun came along with Rio. Akira said a shocking word to us. "Hey, you guys, do you want to see Rio's pussy?"