|Hayate the Combat Butler! Heaven Is a Place on Earth|
Sentai Filmworks describes the story:
When the star-crossed mistress/butler couple take a trip to a secluded vacation retreat, they find themselves trapped in conflicting realities! If it’s not bad enough that Hayate finds himself in a world where Nagi seems to have never existed, Nagi’s having an even less wonderful life, trapped in a mysterious and deadly amusement park of doom!
Hayate the Combat Butler! Heaven Is a Place on Earth Trailer