The crickets chirped outside the dimly lit bedroom of a small toddler kangaroo, the tyke was fast asleep clad only in a pair of tighty whities. Fitting as they were for him, the roo had decided to sleep without his blanket covering him and the cold refreshing air of the night has begun to pool into his room. A couple empty cans of soda and water lay on the roo's desk nearby, spelling disaster for such a young roo. The roo woke up with a startle, a dull pain in his sides had woken him early before was he could he only assume would be a wet bed and briefs for him. He pulled open his briefs to look inside, his undies were still clean and dry but he could feel the need to pee even as looked at his peepee~ 
"Gotta get to the bathroom" the kit jumped out of his bed, the motion causing his aching bladder to spurt pee into his briefs "N-no!" he blushed and pushed his paws down into his underwear and held tightly on his member as he half walked-half potty danced down the hallway trying to be as quiet as possible even as the floorboard creaked underneath his paws, until finally he got to the door of his bathroom. The tyke had gone so slowly that the urge to piss had grown deeply and he could barely hold it. "F-finally" he murred happily, relaxing as his paws left the safety of his pants to try the door knob only for the door to not open to his horror, and a few more spurts of piddle shooting into his tighty whities. His paws clasped back down his underwear as he stopped his stream just in time to keep himself from losing control competely, but the door was locked and he couldn't hold it any longer! "I needa potty!" he shouted trying to get the attention of his dad, but no sign of his dad hearing him came back. He had likely passed out drunk in the bathroom and wouldn't wake up until far later in the night. Unfortunately for him, he has to pee now! Like right now, his body wasn't waiting any longer.
"Nuuuuh" he whimpered, holding his legs tightly together holding his lil dick down , desperately trying to stem the dam that was bursting in his briefs. But it was no use spurts of warm piddle started leaking from his dinky as his paw tried it's best. His tighty whities were white no more as his piddle soaked them and started to pool through them and leak down onto his paws and the floor. The floodgates were fully open as the tyke was pissing his briefs, meanwhile the poor little roo had begun to cry, his desperate wails as he tried his best to stop the flow, but failed completely as his feelings overwhelmed the little roo. 
The roo stopped crying enough to pull and tug down his briefs, far too late of course, leaving him completely naked. Still he held his dinky as he peed on his now ruined underwear. The door to the bathroom finally clicked, way too late for the tyke now.
The little roo, slowly woke up in bed, whimpering as he realized he had a bad dream. His dream had turned out to be true however, the little roo had drunk way too much before bed and now his briefs and bed were soaking wet with his pee and the tyke could only cry and call out for his dad to tell him about him bedwetting once again this week.