Two teenagers share a profound, magical connection upon discovering they are swapping bodies. Things manage to become even more complicated when the boy and girl decide to meet in person.
Sung Jin-woo, known as the weakest hunter, struggles to survive. After a near-death experience, however, he comes back with a mysterious program that significantly levels up his abilities.
A boy raised by boars, who wears a boar's head, boards the Infinity Train on a new mission with the Flame Pillar along with another boy who reveals his true power when he sleeps. Their mission is to defeat a demon who has been tormenting people and killing the demon slayers who oppose it.
