Eugene Santafield is a young man who dreams of becoming a magic swordsman. There’s only one 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?
The title of the book is a pretty decent recap of what the story is about: a young man who was blessed with a form of magic (protection and healing) after years of sword training that did not fit what he wanted out of life and instead of accepting his fate, runs away to join magic high school at the top of the biggest dungeon of the world. His magic makes him extremely well suited to deal with some of the more troublesome miasma spreading prisoners of the magic academy (university?) including the demon queen. When a reincarnator arrives in a flash of fire his life is drastically changed because with her help he can directly fight and defeat the more powerful monsters of the dungeon.
At its core it is a fairly typical OP MC protagonist with confidence issues who collects various women along the way, although at least his issues are mostly self inflicted and not due to some misplaced dismissal by those around him. The world is fairly typical sword-and-sorcery with a dungeon that supposedly grants you a wish if conquered. Characters, mostly women pining for the MC, and plot are also fairly typical. Nothing wrong with that if you are looking for a popcorn read, but nothing special either.
It does come with a bit of a red flag, I cannot help but feel the director of the school kind of pimped out the MC to the demon queen, although I think that was not exactly his intent with the request being more bring her food and entertain her in a more mundane fashion and in return I will cover your tuition, it is what it kind of ends up being, so be warned. Although I suppose, it at least acknowledges physical interaction is a thing instead of keeping it "pure".
All in all, not a bad read perse, but nothing that sets it apart for me either and a potential trope that is not for everybody.