Billy entered the woods. He soon found a deer, pounced on it and devoured a good portion of it.
He lay content, beneath a tree and slept.
The morning rays woke Billy. He looked around and headed back to his house. The sliding door was locked, Billy tried the gargage door and it was open. He gained access to his house and went inside. Billy looked in the hall mirror at his naked form, he had reverted to his human shape but was much improved.
Before he'd been an aging, slightly overweight man in his late 50s. Looking in the mirror now he saw a very tall, very hairy, very muscular bearded man. His tattoos barely showed beneath his dark body hair. There was no way he could resume his life as a cop now, no one would believe he was the same man he was last night before Chase, or whoever that was, had changed him.
Billy thought about the powerful body he'd grown into after being fucked and as he thought about it, his dick arose and, to his astonishment, changed into the shape it had been last night. A flattened head with barbs. The words of 'Chase' rang in his head,
"Sorry brother, it's a one way street unless your me."
Apparently there was something 'Chase' hadn't counted on. Billy jacked himself more vigorously feeling a change coming. Billy's lust took over and the fur of his groin spread up his body and down his legs. Within moments he was the Berlion again, opposeable thumbs and all. He climaxed and doused the hall mirror in his seed.
Billy panted and then growled out, "I need a cigar!"
Shambling into the living room, Billy sat in his recliner, took out a nice long fat cigar from the humidor and lit it. He purred in pleasure, occasionally collecting drops of his clear pre-come and licking them off his fingers.
Billy turned on the tube and as he relaxed he gradually changed back to his handsome bearish human form. The virus, now fully integrated into Billy chose to do what it would. What had bound itself to Billy was a mutant strain now, and would actively thwart weaker, lesser versions of itself. Billy didn't know it, but the virus was a superior verson of the one Alex carried and granted him powers he was yet to discover.
Billy watched the program and when it was done, he stubbed out his cigar in the ashtray. He was feeling sleepy and headed up to bed.
Billy had been asleep for about an hour when Alex/Chase returned to the house.