Student Kameda always hangs out with his best friend Hosoda. One day, Nanami, who he has a crush on, went to a study session at Kameda's house with her best friend, Yui. Hosoda, Yui and Nanami stay at Kameda's house under the pretext that their parents are on vacation. Midnight, “Hosoda” Showing the two girls Kameda's pornography, the four of them turned into a lewd atmosphere.