A strange old woman allows a teenage runaway and a young orphan to stay in an abandoned house that overlooks the sea. However, when a menacing entity threatens their new home, they must band together and face their fears to save it.

The film adapts and expands the Planetarian visual novel by Key. The story is set in a dystopian future where biological and nuclear warfare has left a once prosperous civilization in complete ruin. The film tells the story of an old man travelling around with a mobile planetarium projector to show people the stars.

The Goddesses and their sisters take a camping trip to "My Summer Vacation Mountain." When the sisters uncover another dimension at the shrine gates, they meet an older version of Neptune. Will they find their way back home, and, more importantly, are two Neps better than one?

Unaired episode 13 of Choujigen Game Neptune: The Animation, included in the 7th BD/DVD volume.

Ensemble Square - a brand new building in the middle of the city where countless people come and go. It’s home to four offices belonging to idols who spend their days singing and dancing. Films starring the Ensemble Square idols have been nominated for the Idol Film Festival (IFF), an annual festival held in New York City, and representative idols are selected to attend. The boys jet off to NYC to attend the festival and reception party, and afterward, head out on the town to see the sights and sounds. But a suspicious shadow is creeping up on them…

The theatrical episode will cover events from the fifth volume of the manga.