A continuation of the Koihime Musou OVA, in this story the heroines are invited for a spring break trip to a private resort island owned by the new student council president Enshou.

Shin Koihime Musou OVA

One day Doraemon, Nobita, Shizuka, Gian and Suneo were shooting a film as space heroes. When they were shooting the film in the open lot a boy called Aron comes and alerts them of aliens attacking his planet. They agree to help him by turning into real superheroes, but it isn't as easy as it looks.