Joousama no Shirousagi

Nishina Yukito, the only boy in a family of girls, moves out hoping to find a peaceful life. But a strange encounter at school soon puts him in the middle of an unusual mission. On the school roof, Yukito discovers a spaceship and meets Princess Lacey, a mysterious girl wearing a crown who comes from Planet Kura-ura. She says she is searching for the “White Rabbit,” who is meant to help her fulfill the wishes of ten people—and identifies Yukito as that rabbit.