Tired of life, 38-year-old Makoto (single) was attacked by a thug in a park at night and died. Or so he thought—when he woke up, he found himself in a dungeon in another world! To make matters even better, he had been rejuvenated and now possessed the powers of a spirit mage who could manipulate black flames! Taking this opportunity to escape his miserable days in Japan, Makoto teams up with Yuka, a tsundere high school girl with a mysterious past who wears a witch’s hat. Together, they aim to restart their lives by defeating monsters, fulfilling requests, and achieving a slow-paced life! To do that, they must first escape the dungeon!! "It’s my job to protect you from monsters; it should be easy, right?" "What do you expect from a guy in his forties?!" With their banter proving their close bond, this former middle-aged man and high school girl duo set out to become the strongest for the sake of their slow life in this fantasy adventure!