A sickly girl by nature who passed away at a young age wishes to be reincarnated with the invincible body. Fortunately, her dream comes true. This is a story of her reincarnating in another world as Mary Regalia, a girl who has a complete invincible body with substantial attack power and defense power, most potent magic power, highest speed, and maxed status that no one can defeat. Mary tries to hide her unmatched cheat ability at all costs to lead an ordinary life!!