Hideki Motosuwa is an 18-year-old student living with the short end of a stick. He's short on money, has to go to prep school, and is still a virgin. Hideki dreams of getting into college and having a cute Persocom to surf the internet for pornography with. While he's out one night, he finds a Persocom in the garbage, activates her, and names her Chi, after her first word, which appears to be the only thing that she can say. After trying to hide her from Hiromu Shinbo, his neighbor (and his mini-Persocom Sumomo), and trying and failing to hide her from his landlady, Ms. Hibiya, he decides to keep her, much to her joy.