Kaishaku

The queen from Valhalla planet arrives on earth with a virtual-world-program, called "bride training boot camp". They built several pairs which have to take a random card with a special situation that might occur if you are married. For instance Kazuto and Valkyrie have to make dinner, Raine and Kazuto's sister have to manage poverty or Akina and Hydra have to prepare a wedding ceremony as bride and groom (so everyone gets the most unlikely and unsuitable situation). (imdb)

The highborn Himemiya Chikane is cool and aloof, the perfect young lady of good breeding. Kurusegawa Himeko is devoted to her, and secretly her friend. Their lives are undisturbed in their school, until an ancient evil suddenly rears its head. To combat it, Chikane and Himeko must take on the roles of shrine maidens of the Moon and Sun. (imdb)

Kyoshiro to Towa no Sora revolves around the life of Kuu Shiratori, a seemingly normal high school girl who enjoys her school life in the giant city Academia, which is thought of as a symbol of recovery for humanity since already ten years have passed since the greatest disaster mankind had ever seen, occurred. Kuu has recently been having a recurring dream where a prince meets her and takes her away. (myanimelist.net)