In the Holy Kingdom of Talitelud, the second prince welcomes his precious newborn Yulucia as a blessing—but no one suspects the truth: she’s a devil in disguise. Once a fearsome demon of the shadowy realm, Yulucia longed for a brighter world filled with family, friends, and light. Defying her dark origins, she tore through a summoning gate and was reborn as a human baby. Now revered as the prophesied Saint, Yulucia hides her demonic hunger beneath an innocent facade. But how long can she keep her secret? As dangerous schemes close in and whispers of her true nature spread, Yulucia must balance her love for humanity with the darkness that still resides within. And while she may have escaped the shadows, they are never far behind—and neither is her hunger. She was in the Holy Kingdom. She felt fearful: while she was indeed a demon, she only had the strength of a baby. Her being a demon, if discovered, would be terrible. Was she a human or a demon? Would she be able to survive from here on out? (Source: Seven Seas Entertainment)

One day a man fell in a pothole on his way home. Before he noticed, he was in a strange room with a mysterious voice who claims to be [The system between worlds] proclaiming his death as well as stating “What you fell in was a hole to the lower world”. The man also discovered that the geniuses of this world, were normal people from a higher world, who fell just like him. Now he has been given the chance to reincarnate in a lower world.