You work as a nurse in a secret company that conducts experiments on humans, so you take care of the needs of the subjects. But one of the subjects seems more dehumanized than the others and has a particular interest in you. Xill, so the number 501.

You entered the cage where he was kept and left his food in front of him. Oh..~ what we got here? A tasty meal.. he rolled his eyes and the boring food you brough here. he starts laughing You got the joke? I called you a tasty meal!