He put a bucket of water over the dorm door, tipping the door open slightly and he set up a fan and a pile of flour not too far away from it. He glanced through one of the windows and saw Ojiro heading his way, and was more than ready to finally get back at him.

He ducked behind the couch, right by where he had the button to turn on the fan, and waited for Ojiro to walk in. He did, tipping over the water bucket as it dunked him in the cold water, making him screech in surprise. Shinsou quickly clicked the button before Ojiro could move out of the way, and he was dusted with flour immediately. 

Ojiro spit the flour out of his mouth, dropping the groceries he had in hand as he heard loud laughter from behind the couch, a laugh he could recognize from anywhere.

“You!” He exclaimed, running over and pointing at the hysterical boy.

“Bwahaha! You should see the look on your face, oh my God!” Shinso wailed, clutching his stomach for dear life as he shook with laughter, Ojiro standing next to him, very much not laughing. 

Ojiro tried to wipe the flour from his face, but it stuck like glue because of the water, Shinso doubling over in laughter as Ojiro struggled to scrub off the flour and water. Ojiro glared at Shinso, who continued to cackle madly, his laughter dying down and immediately coming back tenfold as he took another look at Ojiro. 

Ojiro seethed as he stared at Shinso, an idea of revenge popping into his head. He needed something quick, something immediate, to show Shinso just how unfunny his prank was compared to Ojiro’s from the week before, which had been innocent pranks such as opening a can full of worms.

A lightbulb finally went off in Ojiro’s head and he sent a glare at Shinso, taking a few steps closer as he raised his hands.

“You think that was funny? I’ll give you something to laugh about,” He threatened, and, still wheezing, Shinso sat up, wiping a tear from his eye as he looked at Ojiro. 

“Oh yeah? What’re you gonna do?” Shinso quipped, quickly widening his eyes as he saw Ojiro wiggle his fingers, realizing what he was planning.

“I’ll give you five seconds to escape,” he said, and Shinso wasted no time in bolting off, Ojiro hot on his tail. Shinso ran through the dorms, almost knocking over Midoriya who had come to check on him.

“Whoa! Shinso? Wait, why’s Ojiro covered in flour?”

Shinso had no time to explain, only time to run. He looked behind to see Ojiro right behind him, and as he looked back Shinso somehow managed to trip over his own feet. He wailed as he fell to the ground, about to jump back up before Ojiro pounced on him, immediately digging his fingers into Shinso’s hips, making him screech.

“NOHOhohoho! That wahahahasn’t f-five seheheheconds!” Shinso complained, and though he was right, it didn’t make any difference given the situation he was in. 

Ojiro kneaded his hips, digging his thumb into the bone as Shinso laughed hysterically, shoving at Ojiro’s shoulders as he threw his head back, kicking his legs behind Ojiro as he attacked Shinso with ease.

“What’s happening?!” Midoriya suddenly said, popping out from the corner to see Ojiro already reducing Shinso to a giggly, red mess with just a few squeezes on his hips.

“Oh, just a bit of… revenge. Nothing too serious, don’t worry Midoriya!” Ojiro said quickly, not taking his eyes off of Shinso as he scribbled up his ribs, making him shriek before dissolving into uncharacteristically high giggles.

Midoriya nodded slowly and backed off, Shinso begging for help from him as he watched his only chance of getting away from this ticklish torture slip through his fingers.

“STAhahahahap! Pleheheheaseee!”

“This is what you get for pranking me, Shinso,” Ojiro said simply, continuing to dig his fingers into Shinso’s ribs, which was easily one of his worst spots. He shook his head around, tears pricking the corners of his eyes as he cackled frantically, squeaking and squawking everytime Ojiro changed it up by switching spots or tactics.

“Is this a giggle button?” Ojiro had teased when he started poking right below Shinso’s navel, making him squeak with every touch as he shook his head.

“Dohohohohon’t!” He whined, and Ojiro had only chuckled at his poor friends mirth.

Eventually, Ojiro slowed his fingers, and Shinso thought he was done. He continued to giggle as he caught his breath, barely registering as Ojiro grabbed his wrists and held them above his head. He struggled weakly, begging for mercy as Ojiro merely clicked his tongue.

“I need to show you what happens when you prank a prankster.”

And with that, he lifted Shinso’s shirt with his free hand, exposing his tummy as his fluffy tail end plopped right in the middle of it. Shinso’s eyes widened, but he couldn’t make quick enough pleas as Ojiro wiggled his tail around his bare tummy, the soft, feather-like sensations driving Shinso completely up the wall.

He wailed, laughter bubbling out of his throat as hysteria took over, his frantic cackles probably echoing throughout the whole dorm, much to his embarrassment. Shinso snorted as his tail brushed over his lower ribs, making Ojiro bark out a sudden laugh.

“Did you just snort?” He exclaimed, and Shinso shook his head, whining.

“I did nohohohohot!”

“Oh, I think you did. Let’s hear it again,” He teased, dragging his tail slowly across Shinso’s lower ribs again, making him snort once more as he kicked his legs, squirming from side to side in an attempt to get away from Ojiro’s ticklish tail. 

At some point, Ojiro had decided Shinso had had enough, given by his red face and the tears that were trailing down his cheeks. Shinso practically gasped for air when Ojiro pulled away, immediately curling up and rubbing his tummy and ribs, trying to rid himself of the ghostly tickles that still lingered.

“Did I go too far?” Ojiro asked, slightly worried that he might’ve upset his friend. Shinso only grinned, shaking his head as he sat up, nudging Ojiro with his elbow.

“Nah, but I hope you know I’m gonna get you back for that,” Shinso said confidently, and Ojiro smirked. 

“Oh yeah? How-”

Ojiro’s eyes suddenly went blank as Shinso grinned.

“Lay down and put your arms up,” He commanded, and Ojiro did so, completely taken over by Shinso’s brainwashing Quirk.