Tagami Tatsuya has an ambition of world conquest and the first step of his plan is to make every one of his female classmates pregnant.

Opposed to his parents' decision to immigrate overseas, Kagami Kazuya has moved into the girls' dormitory of his school. One day, he decides to peep in on the physical exam of the female students. Mesmerized by the sizes and shapes of the girls' breasts, he comes up with an idea to get them all pregnant to control them. Will he succeed?