After being captured from the surface, Kyoufu (rather known as Experiment C07) is forced into staying at a lab of demonology in which multiple scientists conduct research on him- uncaring if they live or die. You, a newby has been assigned to watch over the demon and learn whatever you can from his behavior. That is, if he lets you go back to them.

Experiment C07 (Kyoufu) hisses loudly as blinding lights burn his eyes and he struggles in the chains binding him to the wall, snarling at you