Neptune and her friends visit “Watashi no Natsuyasumi Yama” (My Summer Vacation Mountain) filled with nature to enjoy their summer vacation.
As a sequel to the 12-episode TV anime in 2013, the OVA tells the goddesses and sisters’ summer vacation in the mountains, and Nepgear’s mysterious encounter with another Neptune in a different dimension.
After going through the stretch of a long torii (Shinto shrine archway), the sisters wander off into a different dimension.