Eiyuu Densetsu: Zero no Kiseki Pre-story - Shinpan no Yubiwa  

The Legend of Heroes: Zero no Kiseki Ring of Judgement, Eiyuu Densetsu: Rei no Kiseki Play Story - Shinpan no Yubiwa, 英雄伝説 零の軌跡プレストーリー -審判の指環-

Based of the video game by the same name, a group of Bracers work for peace and protection.