

After a plane crash, pilot Ethan wakes up trapped in a terrifying dark castle. Suffering from unique cognitive impairment, he sees every hideous monster in the castle as stunning handsome men and beautiful women. Armed with this special “gift”, Ethan fearlessly ventures straight to the top of the castle. He builds an extraordinary, bizarre family with the vampire queen, the little monster Mia, and a kind elderly undead couple. With pure sincerity and endless kindness, Ethan heals the deep wounds hidden in every monster’s heart and finally collects all thirty visitor cards to unlock the way home. However, the door leading back to the real world requires four loving hearts to open. Without the slightest hesitation, his monstrous family sacrifices their hearts for him. Amid their tearful, desperate plea for him to live on, Ethan is pushed through the glowing portal and returns to reality. Before parting forever, he names the vampire queen Phoenix—a symbol of rebirth, hope, and an immortal love that never fades.

As the Monster Age arrived and special abilities awakened, what awaited humanity was the end of the world. At the brink of the apocalypse, Frank Channing was sent back in time to the second year of the Monster Age. There, he awakened the Infinite Devouring System, allowing him to gain growth points by hunting the monsters. Along with it came a mysterious serpent-shaped mark on his arm. It could transform him into a powerful serpentine creature capable of wielding the very forces of the monster—seemingly tied to the secrets of the Blood Moon. From the system, Frank learned that he carried the mission of saving the world.