It was the second day that Osomatsu and Choromatsu had been left at home while their brothers and parents went on vacation. Osomatsu was becoming ever-more annoying and Choro's already limited patience was running thin. Now, the green themed Matsu sat in the living room, reading a book that was undoubtedly about some idol. Osomatsu came in the house, and instead of looking happily oblivious like usually, he seemed to shift nervously under the gaze of his younger brother.
"Choromatsu?" He asked, his hands fidgeting behind his back. "Hm?" Choro muttered, not in the mood to deal with anything stupid Oso might have done. "Can I borrow your wallet?" Of course, Choro thought. Of course that would be what Oso wanted. "No." He replied flatly. "Well um... That kinda sucks, especially since I already took it and spent it all-" He started to walk away, but Choromatsu grabbed his hoodie. "What...?" He slammed the book closed and tossed it onto a pillow. "I-I said I might've spent all your money.." He muttered again. "You.. God damn.. IDIOT!" Choro shouted, punching Oso across the face. Oso fell to the ground. He would've been surprised but he expected this sort of thing from Choro when he was in this state of mind.
"Ow!!" He yelped. It had been only five minutes and Choro hadn't stopped with just one punch, and Oso was essentially beaten up. "Now, don't take my stuff without asking anymore!!" "I did ask!! Just.. After." Choro growled in annoyance and threateningly gripped the front of his brother's jacket. "What? I did!" Oso defended himself, but he did a shitty job of it. Choro had enough already, and slammed him onto the floor. Finally it was quiet because Oso had passed out from the impact. Still livid, Choro decided to just go on a short walk to clear his head.
~
It was five hours after Choro had left when he returned home. Now Osomatsu was upright, but there were bruises forming where he'd been attacked. 'Shit, I went overboard on him..' Choro thought to himself. Sighing, he brought out a small stack of money he'd been saving. "Here. I'm sorry for overreacting, just don't spend it all in one da--" He was cut off by Oso cheering. "Yay! I'm gonna go play panchiko! I bet I'll win!!" He rushed out the door. "I just told you not to--...Shitty eldest brother.." Choro muttered, sitting on the couch.
Ten minutes later Oso came back, his pockets empty. "I didn't win.." He sighed. "Hey, Choro! Do you have any more mone--" "SHUT UP! NO, I'M NOT GIVING YOU ANY MORE MONEY! YOU SPENT IT ALL!" He yelled, punching Oso again. But this time, something was different. Oso looked up at Choro, his face slightly pink, and it looked like he was hard. Choro didn't seem to notice that. "I-I need to g-go." Oso stammered embarrassedly. "Huh? Why? Was I too rough on you again?" Choro felt a bit bad now, but he didn't know exactly why Oso needed to leave. "J-Just don't bother me for a few minutes.." He covered his pants in a way that wasn't subtle at all. 'Oh my god.. Is he..' Choro thought. "Have fun jacking off, Osomatsu." Choro laughed. "S-Shut up! It's not... I'm not.." "Oh, save it. I'm going upstairs."
Osomatsu walked upstairs to their room. The futon was out, it was decidedly Ichimatsu that had left it before going with the family, and the remaining brothers hadn't noticed. Choro lied down on his back, reading again, when Oso opened the sliding door. "Are you done?" Choro asked, not even looking up. "Shut up dumbass." "Don't call me that. You're the dumbass.""Am not!" Oso argued. "Also, this is for punching me!" He kicked Choromatsu hard in the side. "Ow!!" Choro tackled Osomatsu and basically began to strangle him. "I'll kill you eventually, you asshole!!" Osomatsu's face turned bright red now. "C-Choro.. M-Matsu..! S-Stop..!" He stuttered out, but it sounded more like a cry of pleasure than one of panic. 'Seriously.. How fucked up is he?' Choro thought. But he didn't relent, in fact he just increased the pressure. Once again, his older brother was hard, now painfully so. "You really... You're enjoying this!?" Osomatsu nodded weakly, unable to speak at this point. Finally, Oso had to breathe. He yanked Choro's hair, rolling on top of him. "Now then... Fix what you've done, Choromatsu..." He stared dead into Choro's eyes, lustfully.
"I-I can't do that!!"
(Aaaand the end. Ya'll don't get to see the rest unless I feel nice enough to edit this later.)