Adam attempted to walk on his new paw feet, and while he was succeeding in part of the task, it was quite difficult to keep a solid posture. Maybe this was why the Chronivac recommended him a tail. "Well, it can't be that weird can it. I mean Jake has a massive tail, and he says it's one of the coolest things... Fuck it. I'll give it a try."
Adam typed in cheetah tail into the Chronivac. The 3d model opened again showing his already changed feet paw. Adam would adjust the tail to be about 3 feet long, and just for utility, he would make it fully prehensile. "Gotta get some use out of the thing than just balance." Adam told himself. Everything looked good and Adam hit change.
Adam felt pressure in his lower back, as he positioned his hands to feel what was happening. Adam suddenly felt a jolt reaching back and feeling a bump right above his ass. He looked back to see the bump was already extending and grew toa foot. "Oh... Ah... Okay, I see what Jake was talking about." Adam rubbed his new tail as it continues to grow to 2 feet. As it grew, soft fur sprouted from the base. Gold yellow fur with black spots started spreading all around the new growth. Adam felt the soft fur with intense pleasure. Adam fell to his knees to releve himself, groping his new tail
After a few seconds, Adam's tail had fully grown to 3 feet, and the fur had finished spreading. Still holding his tail, Adam managed to swish it around. "Jake was right. Tails are awesome!" Adam managed to stand back up with no problems. He was pacing in the room back and fourth, not even noticing due to his new sensation from his tail. He forgot he was supposed to be testing the waters, but was too invigorated with his recent addition to his spine.
Adam sat on the couch, stroking and admiring his new tail.