Genova no Deshi: 10-byo Shika Tatakaenai Majutsushi, Nochi no Mao o Sodateru

Can a former strongest mage, with a 10-second combat limit, and his cross-dressing female apprentice (desperate to hide her gender) save the world? The former strongest mage's apprentice is actually the Demon Lord!? This is the story of a certain master and apprentice on their journey. The master, Valen, was once known as the "Strongest Mage," but after a tragic event, he lost his beloved master, his sight, and all of his magical power. Now, Valen can only use his former powers for 10 seconds at a time, and he's awkward around women. His apprentice, Ria, is a magical prodigy who forced her way into becoming Valen's apprentice, almost like a wife barging in. However, she's determined to hide the fact that she's a woman at all costs. When Ria reveals the shocking truth that "Valen's master ...