Ten year old Hare enjoys a peaceful life of school, video games, and households chores until his mother adopts an orphan girl named Guu, a girl who's not exactly what she seems. The insidious Guu turns poor Hare's life inside out when she reveals that she's actually a pan-dimensional, mind-reading, magic-using monster with a sarcastic wit, an unlimited appetite, and a taste for driving Hare insane!