The protagonist is tricked by his grandmother to take a special test to attend school. Little did he know, her grandma, being the former head of school, pulled strings to allow him to attend the famous St. Brunehilde, an all-girls school that focuses on knights/chivalry. His new school life would only get more peculiar when he had sudden encounters with transfer students. A woman who sneaked into his room claiming to be his fiancé and meeting a princess and her overprotective knight who ran him over with a carriage. Somehow, he found himself being surrounded by beautiful knights in his new school life.