Saikyou Fuhai no Shinken Zukai (Light Novel)

Licht, an illegitimate son of a prestigious aristocrat, was exiled from his family for being incompetent child. The use of unstandardized magic, absolute swordsmanship, and the “Natural Gift” to be able pull out the legendary holy sword, He needs to conceal them all. And thus, He went on Journey until one day, he encountered Ariarose, a princess of the Latculus Kingdom. She was traveling around helping out others, while hiding her true identity. Moved by her noble ideals, he pledged allegiance to the princess. As Ariarose’s convoy, Licht enrolled to the same royal academy as her. When the atrocious demons that lurking in the academy coming close to Ariarose Licht will unleash his hidden power that he’d hid all those years.