Synopsis
A special government program has been launched to address the declining birth rates among demi-human races that suffer from a shortage of male members. Through what is called an "assistance system," randomly chosen humans are obliged to mate with assigned partners—whether elves, sirens, or even dragons. Iris Thea Eaderlindt, an elven princess known for her open-minded and friendly attitude toward humans, transfers to the Ark Metropolitan Academy. By coincidence, her new teacher has been selected as her mating partner. Filled with anxiety yet determined to fulfill her duty of securing her race's future, she begins engaging in sexual activities with him. To her surprise, Iris learns that her partner's ancestors were orcs, a race renowned for their exceptional sexual stamina. As more demi-human students join the class and discover their teacher's "side job," it becomes increasingly difficult for Iris to keep his attention focused solely on her.