Mahiro awakes from a disturbing dream: having stood at the wedding altar with Nyaruko. He is convinced that this could not have been his free will, and suspects some form of meddling by Nyaruko. But apparently not... still Nyaruko misunderstands the nature of Mahiro dream, and this gets Kuuko and Hasuta involved as well. A quite usual morning at the Yasaka household...

When Tamao and Takehiko visit, they bring along eight tickets to the most popular amusement spot these days: a realistic escape game. And so Yoriko and Shantak-kun come along for the game, located in what appears to be a sinister-looking house. The players then need to group into pairs and decide on what door to enter to clear the mission. It all just seems to be fun and games...

— written by foo2

Note: The OVA received a theatrical run at Shinjuku Wald 9 in Tokyo and 14 additional venues across Japan, starting on 30 May 2015, with runs lasting between 2-4 weeks depending on the theater, alongside sales of a theatrical edition BD. The regular BD release started on 19 June 2015.

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Prequel: Haiyore! Nyaruko-san W