Author's note: this story is based on the anime Dragon Ball Z. It takes place during episode 191 - The newest Super Sayan (not sure what the japanese name or ep number is) right after Gohan saves Goten from being eaten by a T-Rex.
"Goten! Do you know how dangerous that was!? That dinosaur could have had you for lunch!"
"Awww Gohan, I was just playing with it."
"What you were playing was a very dangerous game Goten. You had me very worried, just think of what mom would do if I came home and told her you had been eaten by a T-Rex!"
Goten lowered his head, "I'm sorry Gohan, I won't do it again."
Gohan looked at his little brother carefully. Goten had made promises like this before, then gone back on it without a second thought. It wasn't that Goten did it on purpose, he just never really thought things through. This led to Goten getting in trouble almost constantly lately. Gohan suspected this might have something to do with the influence of Goten's best friend Trunks. Gohan decided that he would have to really make sure Goten really got the message this time and wouldn't be up to any mischief again. And he knew just how to do it!
With a burst of super speed he grabbed the back of Goten's shirt and lifted him off the ground. He yanked both of Goten's shoes off before Goten could protest.
"Gohan!! What are you doing!?"
"I'm going to make sure you don't pull a stunt like that again Goten. Whenever dad wanted to impress a lesson on me he knew just where to apply it!"
As he spoke he tugged on Goten's pants leg and took them down. Underneath his pants Goten was only wearing white briefs.
Goten couldn't believe it! Was his older brother actually going to spank< I> him? Goten didn't think so! He slipped his arms out of his sleeves and dropped to the ground, leaving Gohan holding the empty shirt. Then he sprinted away as fast as he could!
He didn't get very far though. Gohan tackled him to the ground and drew his younger brother's squirming form over his lap as he sat down atop a nearby boulder. Gohan had a lot of experience with spanking (he's taken, and given enough of them!) so he knew just how to restrain Goten and keep him from getting away.
Goten couldn't believe that he was reduced to wearing just his underwear, and over the lap of his usually mild older brother! He couldn't believe Gohan was really doing this! The only other times he'd been disciplined in life had been a few swats from his mother, Chi Chi. But those hadn't really hurt much and he'd never paid them much mind. He had a feeling this spanking would be a lot different!
"Gohan, please don't spank me! I'll be good!"
"I think you've needed this for a long time Goten", Gohan said as he lowered Goten's briefs off his butt. Gohan was struck (as he always was) by how well muscled Goten's butt was. For just a little kid, it was incredibly round and firm. The Son family was famous for their spankable bubble butts, and Goten was definately no exception!
Goten wasn't very embarrassed about Gohan seeing him naked. They used to take baths together all the time, and they both still went skinny dipping in the lakes and streams near their home. Goten had never been modest at all about his body, in fact, Chi Chi used to yell at him all the time about running around nude inside the house! But this time was different, he felt vulnerable, and he was especially aware of how exposed his ass was.
Gohan pondered the best way to proceed, it had been a while since he had spanked anybody. The last serious spanking he had ever given was when he was still a kid, when he had spanked his very own dad! Everyone had thought Goku had died on Namek, but it turned out he had survived and had lived on an alien world for a while. When he finally returned to Earth, Gohan had given him a bare-ass spanking in front of everybody for not letting them know he was alive sooner! That was the type of guy Goku was... he would let his own son spank him if he thought he deserved it. And Gohan had spanked him good that time, Goku hadn't been able to sit down for a good week!
Gohan shook off his reminisces. How long had he been staring off into space while Goten had been over his knee? Not that Goten probably minded. Gohan started the spanking off slow, leaving a stinging swat on each of Goten's young buttocks. Pink handprints on Goten's rear started to merge together to form large areas of pinkened flesh. Gohan slowly covered every part of Goten's smooth rump.
Goten was dismayed that it hurt so much! This was nothing like the spankings he'd gotten from Chi Chi! Those had been over quick, never lasting more than five swats. But the spanking he was getting from Gohan seemed to be stretching out forever! Gohan's hard muscular arms and years of training were in evidence as his hand came down on Goten's small round butt over and over. Gohan started to increase the tempo of spanks, creating a painful beat!
"Gohan, it really hurts! Ouch!"
"You think this hurts? This is nothing compared to what I used to get when I was your age!"
It was true too. Gohan had been spanked more time than he could remember. From his father to his friends Krillen and the other Z Warriors, to even Master Roshi. All had left his ass red and sore for days. Hell, even Vegeta had given him a particularly stinging spanking once. Most of the spanking he had been given were in fun, Gohan was rarely naughty. But those "fun" spankings could make sitting down quite painful for a long time. There was nothing the Z Fighters liked better then to have a friendly contest, with the loser getting a spanking from all of them! Gohan hadn't held back when he was on the giving end either!
Gohan laid down another minute's worth of spanks. Goten gasped and jerked and winced with every whack.
"I'm sorry Gohan! *sniffle* I'm soooowwy!" Goten was in so much pain and embarrassment. It hurt so much!
Gohan gave Goten five more devastating smacks. Goten let out a long wail at these.
"Alright Goten, the spanking's over, you can get up now."
Goten lifted himself off of Gohan's lap shamefully and stood on wobbly legs. He immediately rubbed his hot bottom, trying to get the sting out from Gohan's powerful hand.
"Oooooh!", he said as he hopped about trying to relieve the pain. Gohan laughed at Goten's impromptu dance.
"It's not funny big brother! That really hurt!", Goten stuck his lower lip out petulantly and crossed his arms. Gohan looked at Goten in wonder. Goten hadn't made one move to get his clothes. Now that the spanking was over he didn't feel embarrassed at all about being bare-butt naked.
"That was only a warning spanking Goten, if I had given you a real one it would have gone on until you were in tears."
Goten uncrossed his arms and regarded Gohan speculatively. How did Gohan know so much about spanking? Had he given any before? Had Gohan been spanked before? These thoughts were dismissed as he set about rubbing his poor butt again, he wondered if it would ever stop burning!
"Now, just stay out of trouble and we won't have to repeat this event okay?"
Goten nodded solemnly to Gohan but thought to himself "looks like I'm going to get spanked a lot from now on!". Goten didn't know why he got in so much trouble all the time, even without Trunks around to instigate him. Whenever he got bored, he just tried to make things more interesting, that's all!
Gohan gave the still naked Goten a hug, "You took your spanking really well Goten. You bet that if Krillen had got that spanking, he would've been howling for mercy!"
Goten looked at Gohan with wide eyes, "You mean you've spanked Uncle Krillen?"
Gohan coughed embarrassedly, "Well er, that's sort of a long story. I'll explain it to you some other time okay?"
Goten nodded.
"Good! Now get your clothes back on and let's head back, I won't tell mom about this if you won't."