Rei Miyamoto and Saeko Busujima (Highschool of the Dead) are rubbing their pussies on the beach, like this
Image (Saeko up, Rei down) both girls are naked with tan line (bikinis on the ground, for the type of bikinis and the tan line you can watch ep.13 of the anime (OAV1)) , a lot of fluid come out from the pussies, both girls are excited and embarassed.
Background: jungle, on the sand, during the night (always in ep.13 of the anime)
Title: "Drifters of the dead, censored part"