Leon walked into Derrick's room, closing the door behind him. The horny wolf looked onto the bed where his former friend was sleeping. Leon licked his lips and crawled over to where Derrick was sleeping and pulled the covers off of him. He laid sprawled out on the bed sleeping in nothing but his boxers. Judging by the large tent in his boxers, he was having some very pleasant dreams. Leon climbed on top of Derrick carefully and planted a passionate kiss on his lips.
Derrick was sleeping peacefully, dreaming of a girl in his math class that he had a crush on. She was leaning in close to him, and she began to passionately kiss him. The kiss felt strange and slobbery, as if some kind of canine was kissing him. The dream began to fade away and Derrick began to wake up. When he opened his eyes, they instantly widened as he was greeted to a black bipedal wolf passionately kissing him. Derrick began to wiggle and thrash, trying to escape the wolf's grasp, but to no avail.
Leon stopped kissing Derrick and moved back until he was resting on top of his legs, looking lustfully at the tent in Derrick's boxers. Derrick looked at Leon, horrified as Leon ripped off Derrick's boxers.
"What...are you?" Derrick asked, sounding scared. "No...it can't be! Leon, you weren't infected by the Fur Fever, were you?" Leon just lustfully grinned at Derrick, making his eyes widen in horror once again as he wrapped his muzzle around Derrick's member. Derrick let out a loud moan as Leon sucked aggressively on his dick. "No...Leon...please!" Derrick said in between moans. "I know you're still in there...fight it...please!"
Leon only sucked harder as Derrick moaned and pleaded. Derrick arched his head back and let out a moan as he released his seed into Leon's mouth. The wolf sat up and licked his lips before revealing his own throbbing red member. Derrick looked at his former friend's dick as it leaked pre cum from the tip. Leon moved his member down and positioned it right on top of Derrick's asshole. "NO! PLEASE LEON!" Derrick screamed, but Leon thrust hard into the screaming male and began to thrust wildly, causing Derrick to scream in pain as he continued to get pounded by the canine. Then, the pain began to fade, and Derrick felt pleasure. "No...no no no! Must fight it! Must...fight...ooohhhh!" Derrick began to give into his lusts as he allowed Leon to thrust into him. Leon sensed Derrick's resistance beginning to fade, and he smiled, pounding the male harder. Derrick let his tongue hang out of his mouth as he was fucked hard. As he was fucked, orange fur began to grow onto his arms and spread fast. His hands and feet shifted into paws as white fur grew on his stomach and up to his chin.
Derrick felt nothing but pleasure as his mind was filled with only one thought: "SEX". The fur covered his body as Derrick's chest and muscles became more defined. His cock became red and canine like as it extended to a length much longer than a normal human's, but nowhere near as long as Leon's. His balls grew larger and shot the last bit of his human cum out before gushing out canine cum. His ears became pointed and moved to the top of his head as his mouth and nose extended into a muzzle. To wrap things up, a large fluffy orange tail grew in right above his asshole, completing Derrick's transformation into a bipedal fox. Leon stopped fucking the once human as soon as he released his lupine seed in the fox. Now, the two canines were ready to fuck all the males they could get their claws on.