Zero Damage Sword Saint: I Enrolled in a Magic School and Wound Up in a Contract with the Demon Queen

Eugene Santafield is a young man who dreams of becoming a magic swordsman. There’s only one problem: He can’t use any attack magic! Instead, he’s blessed with extremely powerful defensive and healing magic, an irony that earns him the ridicule of his peers. Determined to escape from those who know of his failings, Eugene flees to the Lykeion Magic Academy where he meets Erinyes, a fallen Demon Queen imprisoned beneath the school. Taken in by his potential, Erinyes appoints Eugene to be her caretaker. Not long after, the headmaster of the academy assigns Eugene to be the guardian of Sumire, a mysterious girl from another world who just so happens to be an Ifrit of legend. With these two women at his side, history’s biggest failure is sure to become a legendary swordsman...right?

After forming a contract with the Demon Queen Erinyes and gaining the most powerful mana of any mage in history, the future is looking bright for Eugene and Sumire, the reincarnator from another world. In order to turn Sumire back into a human and return her to her original world, the pair are aiming for the 500th Level of Babel. With the help of the Holy Swordswoman Sara—who still has feelings for Eugene, her former partner—they make short work of Babel’s numerous floors. But a nasty surprise is waiting for them at the Hundredth Level. The Discipline Beast they must defeat is none other than the Demon Queen Erinyes herself!

Even when history’s biggest failure succeeds, trouble still finds him! Having defeated the legendary Demon Queen and proven his strength to the entire continent, Eugene receives a letter from his father, asking him to come home to the Grenflare Empire for a visit. Though Eugene expects a quick and casual trip with his girlfriends, Sumire and Sara, it takes an unexpected turn when the seal on an Infernal Demonic Beast that almost destroyed the imperial capital a century ago suddenly breaks. Eugene has no choice but to do what many thought impossible: He has to slay the creature! And the key to doing so lies in none other than...an ancient Mana Link technique he has to use with his two girlfriends?!