The 72 Demon Kings, who received the order to destroy the earth, each went through a trial by the Great Demon King Astrea. Those who passed the trial earned the title of Demon King, and each Demon King was granted special powers by the Great Demon King. So far, each Demon King had been granted extraordinary abilities. When Karos became a Demon King, he received a power from the Great Demon King, but "Great Demon King, no matter how much I think about it, there is a problem with my power." "Problem?" Among the Demon Kings with extraordinary abilities Karos received the "Gacha" ability. "Gacha as the power of a Demon King? How am I supposed to rule the world with Gacha?!'"

Yoon Dam is able to see ghosts after the passing of his grandpa, a male shaman. In order to stop seeing ghosts, one must rely on the power of a goblin. One day, Lee Dohyun shows up, claiming that he is a goblin. After that, every time Yoon Dam is harmed, wounds show up one by one on Lee Dohyun's body instead. Mired in this inexplicably bizarre situation, Lee Dohyun starts to show interest in Yoon Dam. "Seriously, why don't you just try becoming my tutor?"The two, tangled up in this bizarre incident, come together in the pursuit of their goals, when...