Noir Stalgia, a lowly noble plagued by discrimination, possesses the extraordinary ability to converse with the Great Sage, who imparts omniscient knowledge. Rejected as a librarian, Noir enrolls in the Hero Academy, urged by the Great Sage to explore a hidden dungeon for strength. Within, he encounters Olivia Servant, a captive beauty gifting him immense reality-altering powers at a perilous cost—each usage diminishes his life force, necessitating indulgence in earthly pleasures like kissing to replenish it. Empowered, Noir embarks on his Hero Academy journey, forging bonds and aiding comrades in need amidst looming challenges.