Naota's older brother went to the U.S. to play baseball, and his brother's girlfriend is making advances on him. There's a so-called alien girl hitting on him, too. With a guitar. Did we mention the robots keep springing from Naota's head?

With a robot and an alien at home, Naota tries to at least have a normal school life. The class is putting on a play, and Naota is playing a cat. He's sprouted cat ears from his head. Class president Ninamori's been chosen to play the lead.