Bokurano [AniDB]
During a summer camp, 15 children, 8 males and 7 females, find a grotto by the sea. Deep within they discover working computers and some electronic equipment, and later the owner, a man called Kokopelli. Kokopelli claimed to be a programmer working on a brand new game, in which a large robot has to defend the Earth against fifteen alien invasions. He persuades the children to test the game and sign a contract. All but one of them signs, barely a moment later they mysteriously awaken on the shore believing what happened was just a dream.
Nodame Cantabile [AniDB]
At a top music academy in Japan, Shinichi Chiaki's arrogance is matched only by his top-notch piano playing. But when Chiaki and the teacher get into a fight, he's demoted to the reject class. Chiaki is left to pursue his dream of being a composer while surrounded by a bunch of loser musicians and one annoying girl, Noda, who has proclaimed herself Chiaki's girlfriend. It doesn't help that Noda, who insists on being called Nodame, lives right next door to him.