The main story retold from Saori Takebe's point of view.

Moochasu, along with three girls, Conchelle, Lasagna, and Paripariume, end up trapped on a mysterious island. Chased by robots living there, Moochasu finds a refrigerator to hide in, subsequently falling into a deep sleep. When he wakes, he finds himself two million years in the future, a world now ruled by robots. (Source: PHP Kenkyujo, translated)

Many years after the goddess Aigis brought an end to the battle between humans and demons, the prince of Logres, descendant of the hero, was living a peaceful life. On one such day, his fiancée, the eastern princess Kaguya, came to him. But before they had time to worry about discussing marriage, demons appeared, and the royal capital was seized in the face of their might. The prince and his allies narrowly escape with Kaguya, and decide to retake the capital. (Source: Harem-Battle)