Revenant Resonance

"Jiha. As long as I am a human who can hear your voice, I will live only for you." Returning home after a graduation party, Yoo Jiha gets caught up in a bizarre phenomenon where all sorts of monsters appear. He tries to escape with others, but in a desperate moment when he's about to be eaten by a monster! In a mysterious room not even mentioned in the rulebook, he calls out someone's name that appears before his eyes... "...Je, Ilheon?" A terrifying monster turned into a human! "You look delicious. How old are you?" "Hiek!" He thought it was a monster that would devour him, but thanks to him, Jiha escapes safely and is scouted by the Management Bureau, which manages and isolate...