Kingdom Hearts is the first game in the Kingdom Hearts series. Revolving around a fourteen-year-old boy named Sora, it details his adventures after his homeworld is destroyed by sinister creatures known as the Heartless, and his attempts to restore his world and reunite with his friends. He meets many characters from classic Disney films and a handful from the Final Fantasy video game series. The main theme song for the game is "Simple and Clean", performed by Utada Hikaru.