If the payment comes even one day late, the heroine's soul will return to the afterlife.
Serment - Contract with a Devil (or Serment, for short) is a visual novel - dungeon crawler hybrid where you play as a girl who was revived by a beautiful devil. And so, her light-hearted, comedic adventure to save up enough money before the deadline begins..Though, instead of claiming our heroine's ever so cliche human soul, the devil demands a huge sum of money for payment.