There's someone in my head, and it's not me! (Antisepticeye)

Sean, or as others like to call him, Jack had lived a normal life for as long as he could remember. Getting up early, record, edit, upload, record, edit, go to sleep, and repeat. One day, not feeling good after recording something, he went to the restroom to splash some water on his face. Something was wrong, and he knew it. Something deadly was about to release, but people blew it off as some kind of sickness that will pass over a few days.