Kazuki Shikimori has lost his memory and discovers that three young girls are pursuing his DNA. Although his magic is extremely limited compared to others, it is believed that his offspring will wield incredible magic. Kuriko Kazetsubaki claims to be his girlfriend. Rin Kamishiro is urged by her family to become his wife. And Yuuna Miyami claims to be Kazuki's wife, based on a promise made when they were children.