Angel's Feather(2006)

Angel's Feather is a supernatural anime series following Hamura Shou, a national kendo champion transferred to an exclusive boys' academy. There he encounters someone identical to his lost twin brother Kai, who vehemently denies the connection. Strange occurrences plague the school, hinting at a parallel magical realm called Winfield. As Shou reconnects with his childhood friend Naoto and befriends classmates possessing unusual abilities, he uncovers his own hidden powers and a destined purpose. The series blends mystery and fantasy as Shou navigates the intersection between the ordinary world and Winfield's secrets, gradually learning what his inheritance demands of him.