Kaelen Vance, a physics prodigy from Earth, wakes up in the medieval fantasy world of Aethelgard as the disgraced third-tier son of a bankrupt noble house. In a world where magic is strictly measured by raw mana capacity, Kaelen is an outcast. His mana is pathetic, his element is merely Water, and the arrogant Prince Alistair never misses a chance to mock him. ‏ ‏But Kaelen sees what no one else does: magic isn't just brute force; it's a mathematical equation. The "Aether Threads" that weave reality can be calculated, angled, and combined. When he crosses paths with Ariel de Lumiere, the Saintess of the Church, they form an unlikely alliance. She provides the raw, divine mana; he provides the brilliant, logical mind to shape it. ‏ ‏Together, they must survive the brutal trials of the Royal Academy, navigate deadly political intrigue, and challenge the corrupt clergy. In a world of brutal nobles and deadly monsters, only the sharpest mind will survive.