Tien was as shocked as everyone else by Goku's new appearance, but seemed to handle it better. Perhaps it was because he'd never been sharing a bed with Goku before he had left, he was able to avoid drooling all over him.
For the most part at least. He may have been better adjusted than the others, but he was still human, and he did notice Goku's appeal. Goku seemed to enjoy being noticed, and went out of his way to tease Tien like he had Krillin and Bulma, though he didn't squirm nearly as much.
What did finally get to them was when they fought. He'd doubted he would actually be able to defeat Goku at this point, but he hadn't expected it to be nearly as one-sided as it had been. He couldn't decide if he was ashamed of himself for not being stronger, or aroused by Goku's new power.
Goku made the choice for him, taking his hand and telling him to meet him back in his room later on. Tien couldn't exactly refuse such an offer, especially from Goku. they sparred a few times after that, to much the same result as their fight, and before he knew it, the fights for the day were over.
All the other fighters would be relaxing for the night, waiting for the combat to resume the next day. Tien went to Goku's room, and though his face burned red when he saw it, he wasn't surprised to find Goku waiting their naked. He considered declining, but he was kidding himself. He was out of his clothes and in front of where Goku was sitting on the bed in mere seconds.
Tien lowered onto his knees and moved his head between Goku's legs, licking his pussy gently. Goku moaned, gripping the bed as he felt Tien's tongue moving along the outside of his pussy before pushing inside of it and beginning to stir him inside.
Goku's hands went to Tien's head, holding him there for a few moments before getting the idea to share the pleasure instead of making him wait his turn. Goku reached over, grabbing Tien and pulling him up so he was on the bed with Goku, his stiff eight inch cock directly in front of Goku's face.
Goku opened his mouth, taking Tien's cock inside and beginning to suck on it as Tien continued to eat him out, forming a sixty-nine. Tien groaned against his pussy, Goku moaning around his cock, both getting more pleasure from it.
Goku's tongue licked around Tien's length as he sucked on it, moving his head along the other fighter's shaft to try and take him deeper. Tien moved his tongue deeper into Goku's pussy, licking faster to please him more. Goku's legs locked around Tien's head to hold his face against his wet cunt, and Tien's did the same to Goku to hilt his cock inside of his throat.
They continued with this for several minutes, moaning together as they pleased each other. Goku came first, tensing up and groaning more around Tien's shaft as he soaked his face. The pleasurable vibrations Goku's moans sent through Tien's cock caused him to cum as well, filling Goku's mouth with cum. Goku swallowed it as they separated from their sixty-nine. Goku grinned, getting onto his fours next with his legs spread, both his ass and pussy on display for Tien, whose member grew even harder at the sight.
Tien got behind Goku, lining up to his pussy and thrusting in hard. Goku moaned, pushing his hips back to help push Tien's member deeper into him. Tien moaned, unable to resist the urge to give his soft, exposed ass a hard smack. Feeling his pussy squeeze tighter around his cock, Tien smacked Goku's ass again, harder, then again.
Goku moaned as Tien reddened his ass, getting a jolt of pleasure and a little pain from each strike, which was only boosted by Tien's cock ramming into his pussy in between each one. "H-harder~!" Goku groaned, wanting more.
Tien brought his hand down harder on Goku's ass, spanking him harder and faster as he picked up the pace with his thrusts as well. Goku moaned in delight, squeezing even tighter around Tien's cock as he got closer to the edge again.
Tien grit his teeth as he tried to hold back his own climax, relieved when Goku came just a few minutes later. He let himself cum immediately after, flooding Goku's cunt with hot cum and making him cry out in bliss at the feeling of it.
Tien wasn't done just yet though. He turned Goku around, pulling out and thrusting into his ass roughly. Tien's cock was slick from Goku's saliva and juices from his climax, so it was easier for him to push into his tighter hole, but it still had a vice grip around his cock once it was inside.
Tien and Goku moaned in pleasure, and it only got better as Tien picked Goku up, standing and thrusting up into Goku's ass. Goku's legs locked around Tien's waist, holding onto him as he bounced on his cock, Tien thrusting hard and fast up into him, the intense sensation of it building every moment.
Tien couldn't quite hold out longer than Goku, reaching his peak the moment he was hilted inside of Goku and pumping spurt after spurt of hot cum into his tight anus. The warm, filling sensation pushed Goku over the edge, causing him to cum as well.
They both dropped back onto the bed, panting hard to catch their breath. Goku laid down, resting with Tien. He was glad he'd had a chance to have this fun with him, because he still wasn't sure how the final battle with Piccolo would go. He had more fights before the Piccolo battle of course, but everyone knew that they would be the final two. Goku wanted to go visit Chichi, just in case it turned out that he wasn't strong enough and Piccolo won, but he doubted he'd have time to go there and get back in time. He had no idea that his future spouse was already at the tournament, waiting for him.