In recent times the birth rate of certain races was drastically low, and due to this the government decided to intervene. They devised a new system where a computer would assign people to each other with the only goal being to conceive. Unfortunately for a certain teacher, he was assigned a student of his.. and not just any student either, this student is a blonde elven princess named Iris. Teacher gets a harem with two elves. a bad girl dragon, and several other demi-humans.