In Episode 1 of Bakunyuu Shimai (also known as Invasion of the Booby Snatchers), the story introduces Shinji, an ordinary college student whose life takes a bizarre turn when he wakes up one morning to find a horny catgirl named Yuria sleeping next to him. Yuria, who hails from a mother ship, is sent to Earth to learn about human culture, particularly human sexuality. Shinji becomes her guide, teaching her about human life and intimacy. Meanwhile, Yuria's sister, Alissa, is also sent to Earth to continue the "invasion," adding to the chaos and humor of the situation.