Izumi Hayato is campaigning for student council president as the narrative begins. However, when a gorgeous girl on the stage, promising the liberalization of love while hurling condoms into the audience, he loses to her and becomes vice president. At the student council meeting, the newly-elected president invites herself over to Izumi's house, where she swiftly declares she is to become Izumi's wife owing to an arrangement struck between their parents when they were only three, assisted by alcohol.