Vermeil in Gold

金装のヴェルメイユ ～崖っぷち魔術師は最強の厄災と魔法世界を突き進む～

Alto Goldfield, a first-year at the Ortigia Academy of Magic, excels in every subject except summoning — and failing it means expulsion. An ancient grimoire in the library leads him to summon Vermeil, a sealed demon of immense power who agrees to be his familiar in exchange for regular mana transfers through a kiss. Vermeil's sudden appearance at Alto's side draws jealousy from his childhood friend Lilia Kudelfeyt and scrutiny from Elena Kimberlight, the academy's strongest student.