Yuuri Watoh keeps a little shop to which no one goes. She sells teas and other herbal option for deal with ailments. However, she’s known as a Misfortune Devouring Witch, so she receives no customers. Until a fateful day Count Ernest Travis Selden visits her shop on the behalf of the king after being recommended to him. Despite the price he has to pay, he keeps coming back to Yuuri’s displeasure.