When Satellite discovers an artillery battery on the R-18 Island, the more mature looking goddesses head out to investigate. At the R-18 island, Neptune, Noire, Vert and Nepgear pass through the security checkpoint in their goddess forms with ease, while Blanc in her goddess form had to destroy the checkpoint to gain access, as it was repeatedly asking Blanc and Plutia (in her human form) for confirmation of their age due to their small breast size. The goddesses then decide to take a detour for some naked antics at the beach. When they proceed to the artillery battery, they find the battery appeared to be nothing more than a bubble making machine. The goddesses return to Planeptune, only to find out Peashy returned to her mother, leaving Neptune depressed.