Lecia, a shy saintess adopted by a duke’s family, suddenly regains the memories of her past life as a powerful mage who once slew a dragon—just one month before her fifth birthday. Along with the memories comes a shocking notice from heaven: “〈Reincarnation Subscription〉 Trial ends on your 5th birthday. Afterward, your reincarnation will be converted to a paid plan. The monthly fee must be paid in ‘Heaven Coins.’ Failure to pay will result in instant death once the timer hits zero.” A paid reincarnation? Death if she misses a payment? It turns out Lecia has been signed up—unwillingly—for the most infamous of all heavenly contracts: the dreaded Reincarnation Subscription. Now, with the spirit of a once-feared black mage and the body of a timid little saintess, join Lecia as she embarks on a chaotic yet heartwarming quest to earn her way through life… and keep her reincarnation subscription active.