Okusama ga Seito Kaichou!

Izumi Hayato runs for student council president, but his campaign is derailed when a striking girl bursts onto the scene, tossing condoms into the audience and vowing to liberalize romance. She wins the election handily, leaving Izumi to settle for the vice president's seat. At their first council meeting, the new president unexpectedly invites herself to Izumi's home, where she promptly reveals that their parents—with the help of a fair amount of liquor—arranged for them to be married when they were only three years old.