Roku-hime wa Kami Goei ni Koi wo Suru: Saikyou no Shugo Kishi, Tenseishite Mahou Gakuen ni Iku

Seven realms have been in clashes for quite a while. Bothered about the conflicts, Arsmeria, the sovereign of the grand domain, conveyed a [Armistice Barrier] at the lines of the seven realms. But this cost her life... A thousand years later, Lloyd, an adopted child from a Count's family, lives happily with Myuria, his young, caring mother, and Kanon, his lovely younger sister. Lloyd is Vance's reincarnation as the escort knight of Arsmeria. Lloyd and Kanon take the World Magic Academy's entrance exam in order to find his wife in this new world and keep her safe until the end. He gets to know a lovely princess from each of the seven empires there. Will he locate his wife?!