The story of the beast king and human who protect the lives of monsters. Tina, who suffered a grievous wound while delving in a dungeon, encounters Garon, the beast king of the demon race, who was once feared as the "strongest." In exchange for saving her life, what Garon demands is her help healing monsters...!? It's the start of a medical fantasy story spun by a human and a member of the demon race. (Source: Shogakukan, translated)