The key to saving the world unexpectedly falls upon Abel, a devout cleric in the hero's party. One day, he is suddenly tasked with an outrageous mission: save the world through a forbidden ritual. Standing before him is Suzuka, a stunning red-haired, black-horned demon and the last surviving succubus. Their sole duty is to fulfill the intimate ritual known as the "Succubus 48 Techniques." Caught between the fate of the world and passionate nights, an unconventional quest to save the world begins.