So, let's start at the beginning of this match and explain a bit of why things went the way they did so it makes a little more sense.
The opponents are shinobi, ninja, shadow warriors. I emphasize this because it makes a huge difference for Kurama. He was a strong fighter, despite a few bad habits which Hiei points out, but he hadn't really ever fought ninja before. He'd fought a lot, don't get me wrong, but bounty hunters and most demons fight in different ways than shinobi. First off, most demons don't really set up a kekkai to fight. Most demons just fight, revealing a lot of themselves in their attack. Kurama's style was to get to know his opponent and hurt them as much as possible. He is a kitsune, after all, and there is a certain amount of playfulness inherent in that. And, in many ways, Kurama is a lot of a masochist. He gets off on pain and being almost beaten is a delicious pain, then his sadistic side comes out, he hurts his opponent.
Using such techniques against opponents who fight more openly is usually quite successful and explains Kurama's reputation and how he could be so stupid in his fight against Gama. Yes, he was stupid. Gama was a professional fighter, not just a demon who liked to pick fights. So, because of Kurama's bad habits, which aren't usually an issue and actually kind of a benefit at times, he ended up being trapped by Gama, assuming that his only paint brushes needed to be avoided and based his strategy on that. Not considering that there could be more and not paying attention to Gama's comment that his makeup contained his blood. While he deliberately allowed himself to be chained in a move to lure his opponent into his trap, he didn't anticipate being hoisted on his own petard and having his youki trapped within his body.
Touya was a bit more of an 'honest' fighter, but Kurama was at a serious disadvantage to start with, with his limbs weighed down and his youki trapped, though a side effect of his youki being trapped did seem to be that his limbs became stronger, able to move more freely, though he couldn't summon a weapon again. At least, not yet. Touya was more directly powerful than Gama, but his attacks were also more direct, playing into Kurama's strengths, even his tendency to play with his opponents. He was able to control the fight to the point that Touya attacked when he was prepared. While it was difficult and more painful than he cared for as well as slow, Kurama could cause plants to grow within his own body. It took all he had left in him to control the shimanekisou long enough for it to attack at the right time. It was also the only thing holding him up at that point, as well. He won, but the cost was steep.
As has been established, those running the tournament really wanted Yusuke and company to lose. The demons wanted that as well, so they weren't likely to protest. The announcer was beginning to suspect, but what could she really do? She was little more than a clock, after all. So, even though Kurama was out on his feet, he had to keep fighting and his next opponent took a great deal of pleasure in the fact that he didn't fight back.
Now, Yusuke had no problem, for the most part, watching Kurama fight when he was able to fight. He would prefer that he didn't get hurt and he knew that Kurama could handle himself. But, when that sadistic idiot decided to use Kurama as a punching bag, Yusuke's temper almost got the better of him. He would kill for Kurama's sake, had the other team's leader not stopped him. As it was, once he was able to remove Kurama from the ring, he let his anger and frustration out, making short work of the idiot.
Once his irritation was eased, he was actually able to enjoy his fight with Jin; they both took joy in the battle against a well matched opponent. It was a delight for them to just fight, both forgetting in the excitement that they were still within the tournament. Were it possible, they would have just enjoyed fighting for as long as possible, day after day, just for the sheer joy of it. This made the fight quite enjoyable for those in the crowd that would allow themselves to be entertained by a good fight. As established, this was, by far, the minority.
The majority of the audience didn't want a good fight, they wanted the humans and the demons who fought with them to die and the judging committee wanted to win their bets against the humans. This happens to be one of the cardinal things that a committee in charge of a fight should not do, but the ultra rich tend to think the rules don't apply to them, even the rules they themselves make up. So, while Yusuke was declared the winner and Jin accepted that, believing they'd had a very good time. The judges, however, in order to try and protect their fortunes against their inability to predict just how Yusuke and company would react to such challenges, reversed the decision of Yuri on a technicality they had over looked in other cases for the sake of a good fight. After all, if the judges were going to be utterly fair, they'd have to consider all the time that Jin was outside the ring, flying around the stadium, unquestionably outside the ring in the center, not just so far above it that in order to be sure if he was in or out, you'd need to look down from above him or draw a barrier from the ring up, neither of which happened. But, of course, none of that was ruled on because to do so would have made Yusuke the winner in the match before they could come up with an excuse to make him lose.
Now, with Hiei and the masked fighter contained and Kurama already declared lost and now Yusuke lost, that only left Kuwabara, who was badly injured, but having not fought in this round yet was still considered a viable contestant by the committee, even if he was flat on his back. Even more, in order for Yusuke's team to advance, Kuwabara had to win, which didn't look very likely. But, in a short break between matches, so generously granted by the committee, Shizuru and Keiko found Yukina and brought her into the stadium.
It was rather remarkable that Kuwabara managed to pull himself up and get into the ring before he saw Yukina, but somehow, he managed to hack enough of his brain to get into the ring, even though he was severely injured.
Risho, the leader of the shinobi team, wasn't gentle at all with Kuwabara, attacking him as viciously as if he were facing a fully able demon rather than a barely standing human, yet Kuwabara managed to pull himself up after every attack, even before he saw Yukina. But, just getting up after each attack doesn't really win a fight, even if the judges weren't against you in the first place. So, Kuwabara had to do more, he had to do more than just 'bring his A game.' He had to win, but the odds were so badly against him that he would have been lucky to even survive the match, much more so to win it.
But, as I said before, Kuwabara didn't believe this was real; he believed he was in a game, so all he needed was a way to level up. And, for Kuwabara, the fastest, surest way to level up was the 'power of love,' or possibly the dread fear that he'd make a fool of himself, his definition of fool, in front of the girl he was head over heels in desire for. So, seeing Yukina watching him in the stands really was the impetus he needed to push his game beyond and defeat Risho in such a way that not even the committee could argue with his victory, could not reverse the decision. It also helped that Hiei and the masked fighter broke out of the kekkai and were more than ready to take on the entire stadium if needed. So, our team made it to the semi-finals and to a couple of days of well earned rest.
That night, with Kuwabara still needing medical care, mostly supplied by Yukina with Botan and the Masked fighter lending assistance, Yusuke found his way into Kurama's and Hiei's room, stopping in the doorway to watch as Hiei carefully remove the shimanekkisou from Kurama's body.
"Come in, Yusuke," Kurama whispered, his voice trembling with just controlled pain.
Yusuke entered, moving to kneel in front of Kurama, moving when Hiei's knife was away from Kurama's skin. "Anything you need?" he asked, brushing Kurama's hair back.
"Kiss," Kurama asked, tilting his head a little. He was ridiculously turned on from the pain and needed the safety of being with Yusuke and Hiei to find relief.
Out of the corner of his eye, Yusuke saw Hiei nod. He leaned forward, tugging on Kurama's hair, until their lips met. Kurama's kiss was desperate, hungry, submissive, imploring Yusuke to dominate him. Yusuke was more than willing to comply, some of the irritation from earlier morphing into the frame of mind that he needed to be dominant, to push Kurama into that place where he could forget for a few moments. Yusuke's fingers moved to Kurama's scalp, his nails digging in, drawing out moans from Kurama as Hiei continued to cut out the weed.
A clack let them know that Hiei had set the knife on the side table. "You're going to suck Yusuke's cock while I fuck you," he ordered, pulling off clothing, his and theirs, taking no care to ensure its further wearability, his fingers finding the weaknesses in the fabric that covered what he wanted exposed. He even pulled Yusuke around so that he was resting against the head of the bed and then moved Kurama so that his mouth was over Yusuke's cock, drawing out complaints from both of them. "Shut up, you can take your time next time," Hiei said, smacking Kurama's ass hard enough to leave a red impression.
Kurama groaned, rubbing his face against Yusuke's cock. "I think he means it," he panted out.
Yusuke threaded his fingered through Kurama's hair. "I know he does," he said, guiding Kurama down.
Kurama groaned as Yusuke's erection slipped between his lips and Hiei's cock entered his body at the same time, drawing a delicious groan from Yusuke as his hips rolled into Kurama's mouth. He whimpered at the brutal rhythm Hiei set up, gagging a little as Yusuke pulled his hair to force him to match it on his dick, but Kurama was quickly reaching a place of utter bliss where his mind could be empty and he could surrender completely to the two around him.
Hiei met Yusuke's eyes over Kurama's back. They both knew exactly what place Kurama was reaching for and how much he needed it, especially as quickly as he dropped this time. A silent warning in Hiei's eyes told Yusuke he'd better last as long as possible, that Hiei intended to fuck Kurama until Yusuke begged to come and Kurama needed a very long fuck.
Yusuke swallowed thickly and kept his eyes on Hiei's while his hips thrust into Kurama's mouth, his fingers pulled the red hair, controlling the kitsune's head, watching Hiei's body thrust into Kurama's ass, seeing where the koorime's cock entered the kitsune's hole even with his eyes on Hiei's. A subtle nod from Hiei and they all came. After resting, drawing Kurama back to his skin, they spent the rest of the night making love.