Neptune's Summer Vacation (守護女神（ねぷ）のなつやすみ, Shugo Megami (Nepu) no Natsu Yasumi）is the second OVA of Hyperdimension Neptunia: The Animation. It first premiered on PlayStation Video for a limited time from July 8, 2019 to July 21, 2019.
Characters are shown in order of appearance. An asterisk (*) near the name means the character have debuted in this episode.
- Neptune (Older)*
- Vert mentions a crown in Lowee that can turn anything into a princess and imagines Rom and Ram as princesses. This is a reference to the Super Crown in New Super Mario Bros. U Deluxe and the Bowsette internet meme.
- The "That is COOL" tagline is a reference to a specific Japan-only model of the Sega Saturn that had "This is COOL" printed on it.