Due to a certain opportunity, I and Ms. Yamada (Konatsu Kashiwagi) became friends who masturbated together, essentially becoming "masturbation partners." One day, Ms. Fujisaki (Miyu Aizawa), whom I admired, discovered this—Ms. Fujisaki had also joined our masturbation partnership! However, based on Ms. Fujisaki's vaginal masturbation—specifically, "mutual penetration masturbation"—our relationship became awkward…