Ethan Vance, a battlefield combat medic from Earth, dies saving others and awakens in the body of a disgraced, powerless nobleman in Astraria — a matriarchal magical realm where a centuries-old curse has left men rare, fragile, and sheltered like glass dolls. But Ethan's reincarnated soul carries a singular anomaly: a mana core that radiates an Aura of Absolute Rejuvenation, purifying the realm's lingering blight and supercharging any mage who grows close to him. Enrolling at the elite Aegis Magic Academy to study healing magic and live in peace, his quiet acts of kindness and his rare, intoxicating mana draw the attention of the four most powerful women in the realm: a cursed High Elf paladin counting down her own death, a dragon-kin commander whose instincts mark him as her treasure, a holy saintess whose faith died long ago, and a dark elf rogue sent to abduct him. Each is pulled toward what Ethan can give — until, one by one, they begin to want the man himself. As a doomsday cult moves to shatter the continent's failing Mana Core and unleash the old curse anew, the healer who has never let anyone heal him must decide whether to sacrifice himself for the world — or finally learn to be saved.