My mission is to use my lifespan to create miracles and save people... Yet it seems no one intends to get hurt at all. 'When there's a healer, why do you need to raise your defense that muuuuch—' The chaotic story begins now: of those around the Saintess who start becoming invincible to protect her lifespan, and the Saintess who wants to use her lifespan to return to her original world.