After graduating from Minerva's Mage Training Institution, Louis has climbed his way to the top of the Magic Corps and learned to speak like a gentleman, all to marry the girl he loves. And now, he's all set to clear the final hurdle: becoming a Sage. But just before the Selection starts, his beloved fiancée Rosalie suffers a nasty fall and loses her memory. As Louis works to discover the truth behind the incident, an unexpected new candidate for the Seven Sages appears-a girl prodigy who can use magecraft without uttering a word. Disaster looms and secret plots abound as the story of the Barrier Mage's youth reaches its exciting conclusion!