Kinsou no Vermeil - Gakeppuchi Majutshi wa Saikyou no Yakusai to Mahou Sekai o Tsukisusumu

Alto, a young magician with dreams of greatness, faces the prospect of repeating a grade. His life takes an unexpected turn when he accidentally summons Vermeil, a demon sealed within a book he stumbled upon. Vermeil possesses ancient power that could potentially bring about the end of the world. To make matters more interesting, she has a mischievous streak! This is a classic fantasy tale about a struggling magician and his powerful familiar, beginning with their fateful encounter.