You didn't know what to say...but then you sprouted the words "Y-you have to control it John" Corbin says slowly. John was struggling with his body violently shaking, the muscles spassing out underneath his clothes.
He groaned against the ground, feeling his tendons struggle "I c-cant!" John said clenching his fists as the power rushed over him. Corbin saw in horror as John's cock sprouted from his trousers. John started rubbing it to try to relieve some of the stress but it just made it worst. It kept elongating grewing immensely with his body still shaking.
"Whats...h-happening to me" John said watching in horror as his cock grew three times bigger, then four then five. He moaned pleasurably as it kept increasing in size "It...feels...so...good". It ruptured through his jeans revealing the growth. That was when John gave in to it. His cock violently shook upwards as well as John did, he screamed out in pleasure as it did. He groaned in pleasure as his voice got lower. His entire body was rupturing in muscle, ripping through his clothes tearing them piece by piece.
He pushed himself forward as his back cracked, His screaming was disappearing. It was a satisfying experience. His skin now darkening and forming large amounts of fur, his cock rupturing and becoming harder. His neck expanding and growling. He was now covered in fur completely. His skin got more leathery, the claws on his hands got longer.
Out of his head petruded 2 horns, his entire body was now resembling corbin but more muscular and monstorous. He screamed in pleasure as his body kept increasing in muscle mass. Then he stopped. He stood up now 5 times bigger than Corbin staring down at him. IRL John had been struggling as well, his muscle mass also increasing. Corbin looked in horror as his friend grabbed him and violently shaked him.
"John...let go of me!". Johns eyes were red, he groaned as his cock ruptured his trousers and grew towards Corbin. He shaked it towards Corbin and to Corbins horror it fused with him. Corbin screamed trying to escape "John no!" But now he had a bigger problem he had this weird sensation, he was enjoying the changes. He had to resist it. John was now fully absorbed in him, now Corbin was the only one there and increasing in muscle size. He lay on his ground rubbing his cock trying to stop the transformation, but he couldn't anymore. He was now a passenger and he felt the energy rush into him growing him outwards.
Corbin stood there in complete awe of his new body, he flexed it and rubbed his dick. He didn't care about the game anymore, he walked forwards into the real world and looked for someone else to fuse with.
-The Mentality Ending-