Angels Feather - PC Games

Also made into an anime OVA. Chou, winner of the national kendo championship, is transferred to an only boys private school. He there thinks he meets his lost young brother Kai, who strongly denies this. Strange things happen at the school somehow referring to a magical world called Winfield. After re-encountering his best friend Naoto and while meeting many new friends, which each have specific abilities, he soon discovers his own inheritance and the difficult tasks ahead.