I do not own Fairy Tail or the Simpsons. Takes place when they were kids.
Act 1.
Natsu and Gray has been competing in many events. Now it was time for a burp contest. Natsu and Gray took turns in burping to see who can burp the loudest burp. Happy floated in the air to mostly watch them. Natsu took a sip of soda and burps. Gray took a couple of gulps and burps a little bigger burp.
Erza burts in the room they were in.
"What are you two doing now?" Erza asked the boys.
"We're having a," burp "contest, Erza," Natsu told her.
"What?" Erza raised a brow.
"We're having a burp contest, Erza," Gray answered for her.
"Cut it out," Erza scolded. "I despise burping."
Erza leaves the room. Natsu stuck his tongue at the door.
"How can she not like to burp?" Natsu asked.
"A girl thing," Gray said. "But..."
Natsu took another sip of soda and lets out a loud burp. Gray took a sip of soda and did the same.
"The show must go on," Natsu announced. Gray and Happy nodded in agreement.
End of Act 2.
Gray took a sip of soda and burped. Natsu took a sip himself and before he could burp, Erza came in again.
"Natsu!" Erza yelled.
"MMPH?!" Natsu muffled.
"What did I say about burping?" Erza asked.
"MMM MMM MMMM," Natsu shrugged.
"I said, no burping," Erza reminded the pink-haired boy. Natsu's face puffed up and bubbles comes out of his ears. "And when I say no burping, what do I mean?"
"MMM MMMMMMMM," Natsu muffled.
"That's right," Erza stated. "No burping. You better not disappoint me or I'll give you a beating of your life."
As soon as Erza left, Natsu lets out a monster burp, and he falls on his back feeling dizzy. Gray and Happy applauds him.
Act 3
"Watch this," Natsu said, "the burp champion of the world."
Natsu took a big sip and burps loudly.
Once again...
"NATSU!" Erza yelled. "ARE YOU BURPING AGAIN?!"
"Maybe," Natsu answered.
"Why all the burping?" Erza asked. "What's the thrill?"
"It's fun," Gray said.
"Aye!" Happy added.
"It just gross and disgusting," Erza said. "Honestly, Natsu, just because you were raised by a dragon dosen't mean you have to behave like one! And Gray, I doubt very much Ur ever taught you that! Just grow up!"
Erza leaves the room again.
"It's still fun," Gray deadpanned.
"And I'm still the burp champion of the world!" Natsu gloated.
Happy let's out a bigger burp than than the one Natsu just let out."
"Natsu," Gray said, "meet the new champ."
Natsu started to pout that he was just beaten by a cat.
Act 4.
"Watch this," Natsu sipped and burped twice.
"Oh yeah," Gray countered and burped three times.
Erza burps, I mean bursts in again and glares at the two boys. Erza starts beating the living daylights out of the boys. Natsu and Gray started to fight Erza only for her to beat them up again.
"I told you what would happen if you kept urping," Erza smiled.
"Natsu and Gray are laying on the floor bruised and bandaged. They had red lumps on their heads.
The two young wizards made a promise to each other. No more burp contests.
The end.