A/N: WARNING! Rape, non-con/dub-con, blackmail.. Osomatsu is kinda.. scary here so be warned!

Todomatsu was bored and a little worried. Atsushi has work on a weekend so can't text him back, Ichimatsu is out somewhere (Probably petting a stray cat or murdering someone, who knows.), Karamatsu is out in the park too while Osomatsu and Choromatsu have been gone since yesterday. They have not home since last night and their two other brothers still had the guts to roam around!

"Tch. They are probably dead out there. Who cares? I need to go somewhere."

"Ah~ Surely, if they are together, they will overcome anything! Choro is probably babysitting Osomatsu after drinking too much last night. I will check Chibita's apartment if they slept there. Godspeed, brother!"

Gah! They piss me off! Osomatsu-niisan and Choromatsu-niisan too! They did not even tell where they are going! Totty crossed his arms with a huff. At the corner of his eyes, Jyushimatsu is laying on his stomach on a yoga ball. He has been trying to reassure him if they are fine.

He also said that if something happens to them, he'll know. Todomatsu was confused by this and asked him what he meant but Jyushimatsu only replied with a wide grin and an "I'll just know."

..For some reason, Totty believed him instantly.

He sighed and looked at their bookshelves instead. He pulled out one of Osomatsu's mangas. He flipped some pages with a bored expression until a folded piece of paper fell from between the pages. Totty raised a brow and picked it up. He unfolded the paper. It is actually a letter with bright red writing. He could tell it was written by his eldest brother. He proceeded to read.

To my little brothers (except for Choro),

Congratulations! \\\٩(•́⌄•́๑)و/ You have found a treasure! No money for you tho (•́⌄•́๑)و ✧

I wrote this letter to let you guys know that I have finally won a jackpot in pachinko! To avoid all of you from stealing my money, I went on a trip! With Choromastu! Genius, right? I know it is!

We'll be gone for three days. I made reservation and shit, so don't bother calling us to come home. We'll get you guys something when we come home. (I only wrote this because Choro demanded me to do so lol) Try not to kill each other before we come home~!

PS. Get my manga back where you found it. Choro doesn't know where I put the letter. Lol d=(´▽｀)=b

..I will kill those two. The letter got a bit crumpled in Todomatsu's hands. His eyes are covered with his bangs and his pouty lips quivered a little.

Jyushimatsu turned his head to look at him. "Totty? What is that letter?"

Todomatsu took a deep breath. "I fucking hate my older brothers!" He yelled out, completely crumpling the letter.

Jyushi paused before smiling. "Yeah, you already told us that. Haha~!"

Osomatsu sneezed and rubbed under his nose.

Choromatsu turned his head to look at him. "What's wrong? Did the open air bath last night give you cold?"

Oso sniffed and shook his head. "Nah, that can't be it. If I catch a cold, I would've been sick last night."

Choro hummed in a thought and bumped his fist on his palm. "Ah, older people say that sneezing without a particular reason means that someone from afar is thinking about you."

The elder one hummed and chuckled. "And you're one of them." He snickered mischievously.

Choromatsu frowned at hm. "I still don't know why I came here with you."

Osomatsu chuckled and wrapped his arm around Choromatsu's waist. "Because you love me sooo much!"

The younger one groaned in annoyance. "You're annoying me.. so? What is our plan for the day?"

Osomatsu hummed. They arrived at the onsen yesterday night. They simply enjoyed the hot spring and the wonderful food. He also selected a room with a great view of the mountains and trees. But, of course.. He did all of this for a reason.

"Well.. Choro..~ I actually have a gift for you and I want you to use it!" He grinned widely.

Choromatsu raised a brow, wary of his brother's actions. "…What is that? That better not be porn."

Osomatsu chuckled and shook his head. "Of course it is not! You have weird taste in porn anyway. Wait here." He went to his large bag. He unzipped it and pulled out a wrapped gift. He gave it to him. "Open it!"

Choromatsu took the gift, still weirded out by the situation. He felt around the gift. Well, it is soft and big so it is kinda hard to guess. He sighed and opened the gift, tearing it open. He gasped and quickly pulled the contents of the gift. "Th-this is.." He took a good look of the item in his hands. He gasped once more. "No way! Nyaa-chan's complete set uniform!" He took a close inspection to the blazer and skirt, as well as the paw mittens and cat ears. "Uwaah~ This set has all the exact fabric that Nyaa-chan uses! It has her size and smell too!"

Osomatsu grinned proudly as he rubs under his nose with his index finger. "Hehe. Your niichan is cool, right? I got this present only for his adored little brother!" Well, I got lucky with the size and smell though, what though. Seriously, what the fuck, Choro?

Choro smiled at him blissfully. "Ah, niichan, you bought this only for me?"

Osomatsu only grinned wider, feeling proud and happy with making Choromatsu act so cute."Of course I did! Ah, Nichan is spoiling you right now, huh?"

The younger one chuckled and held onto the uniform, straing at it with a smile. "… This has some sort of payment, doesn't it?"

Oso hummed and chuckled. "..So you knew, huh?"

Choromatsu sighed and looked at him. "I'm not dumb, Osomatsu-niisan. Besides, you're too obvious. Taking me out on a trip so suddenly and taking care of all the expenses. That is already a dead giveaway!" He sighed. "But I guess I'll humour you. What is it that you want from me?"

Osomatsu chuckled and smiled a bit. "Not a big favour, really.. I just want you.. To wear this uniform~!" He grinned in anticipation.

Choromatsu gasped and bit his lip before looking at the uniform in his hands. "B-but.. Nyaa-chan's scent would be tainted with my own!"

Osomatsu chuckled. "There are more of Nyaa-chan's scent from where it came from.. Trust me.. Just this once, Choro-chan?" He made his eyes look like a puppy's

Chiromatsu blushed a bit and gritted his teeth. "ugh, fine, fine but I have two rules! No pictures and no videos."

Osomatsu grinned and nodded. "I promise, Choro-chan.. Now, go on and change~! I'll wait here."

Choromatsu grumbled and went to the bathroom to change from his kimono to the uniform.

Osomatsu smirked. This will be fun

After a few minutes, Choromatsu stepped out of the bathroom with Nyaa-chan's uniform. It surprisingly fits him well if only the skirt is a little bit longer. The skirt's length is too dangerous that he underwear could be seen when he is bending a little forward or backward.

He is flushed deep red as he pulled the hem of the skirt down to avoid and accidental panty shot position. He looked around the room. "O-osomatsu-niisan, this is not good, after all.." he finally found his brother, who is next to a window. Choromatsu's eyes widened.

Osomatsu is now wearing Choromatsu's green hoodie and pants. He grinned at him. "You look good, Fappymatsu! Or should I say Nyaa-chan?"

Choromatsu frowned at him. "What are you doing? Why are you wearing my hoodie?"

Osomatsu only grinned and hummed. "Can't you see? We're gonna roleplay! This should be fun because you will act like your favourite idol! And I will act like you."

Choro tried really hard to find any sense in what Osomatsu said. "Are you fucking kidding me, Osomatsu-niisan?! There is no way I would do this..! Besides, you only did this to mock me, right? Right, Osomatsu-niisan?!"

SNAP!

Choromatsu gasped as when he noticed that Osomatsu took a quick shot of Choromatsu while he was fuming. "W-wha- HEY!"

Osomatsu grinned at him. "I didn't wanna do this, Choro but I will send this to everyone if you don't cooperate. I promised that I won't take any pictures if you do as I say."

Chromatsu growled as he glared at his older brother. "You.. I can't believe you!"

Osomatsu smiled at him apologetically. "Come on, Choro.. For me? Nobody will see or hear anyway.. No one would bother us in this room until it is dinnertime.. After we are done, I will delete the photo."

Choromatsu frowned and continued glaring at him. "No more tricks."

Osomatsu grinned and nodded. "No more tricks..!"

Choromatsu sighed and nodded. "Fine.. No any other tricks.. And you would NOT tell anyone."

The older one nodded. "Trust me this once. Everything that happened and what will happen in this trip is a secret between the two of us.."

Choromatsu huffed and nodded. "F-fine.. I just need to.. Gather myself.." he sighed. "so? What is the setting?"

Oso hummed. "Setting, huh.. What if Nyaa-chan is in disguise is public and was attacked by someone. You would defend her from them..?"

Choro hummed and nodded. It is actually a pretty good one. "Okay. I am being attacked by them." He cleared his throat and tried to squel in the girliest Nyaa-chan impression that he can manage. "H-help me! Someone, please!"

The older one wanted to laugh out but he stopped himself. He was grinning and his lips are quivering. "G-get away from Nyaa-chan, you unholy violators!" he pretended to punch someone away from Choromatsu and made sound effects with his mouth. "Pow! Pssh! Whoooa!"

He knows he is doing a shitty job but Choromatsu continued acting nonetheless. "Ah! Thank you, mister..!"

Osomatsu smirked. "Don't thank me yet. I will tie him up so that the police will take care of them." he gave Choro a thumbs up.

Choro sighed in relief. "Y-you're right, nyaa.."

The older one gasped. "Wait.. You're Hashimoto Nyaa-chan! Nyaa-chan, I am your biggest fan. I am Choromatsu! Matsuno Choromatsu.."

Choro smiled and shook his hand. "Choro-kun, I owe you my life..!" he put his hands on his chest. "Whatever shall I do to repay you?"

Osomatsu hummed and put his fingers below his chin. "Well.. Nyaa-chan, could I get a special pass to your dressing room in your next concert?"

Choro hummed. So far, Osomatsu has been good at this. "Well, that would be done..! Anything for my special hero!"

Osomatsu grinned and spun around. "Timeskip!" Choromatsu gasped and frowned at that. "H-hey, that's not how it works!"

Osomatsu smiled at Choromatsu and ignored his exclamation. "Nyaa-chan, thank you for letting me in..!" he sat beside him.

Choromatsu groaned and smiled back. "I-It is nothing compared to saving me.. Thank you again!"

Osomatsu chuckled. "You're welcome, Nyaa-chan.. Maybe you would be able to repay me in another way then."

Choro gasped when he felt his brother's hand on his thigh, rubbing in up and down. "W-what? Wait!"

It was too late. Osomatsu tackled him and pinned his hands above his head with his right hand. His left is already pulling on his underwear.

Choro turned red because of embarrassment and anger. "O-osomatsu-niisan, what are you doing?! Stop that! This is not funny!"

Oso chuckled. "My name is Choromatsu, remember? Come on, Nyaa-chan.. I'm sure that you've done this with your other fans." he started unbuttoning his uniform.

Choro panicked. He's nuts! I should have known! He molested Totty when he crossdressed last time! "Osomatsu-niisan, stop it! I don't wanna do this anymore! Let me go!" He hoped that his screaming would reach someone.

Oso did not listen to him. He pulled out some handcuffs from his pocket and cuffed Choromatsu's wrists on the table stand. He licked his lips and smirked. "You look so cute, Choro.."

Choromatsu struggled against the cuffs and glared at him. "You called me Choro that time! Stop this, Osomatsu-niisan!" Small drops of tears threatened to fall down from his eyes. The older one paused before leaning in to kiss his tears away.

Choromatsu gasped and looked up at him. "W-wha.."

Osomatsu smiled at him before kissing his lips gently.

The younger one was stunned. He is very confused and scared at the same time. He could hear his own heartbeat pounding on his ears. Why is Osomatsu-niisan doing this? Is he fooling around? This is not funny anymore.. Even though he is shaken up because of the situation, he felt, somewhat safe even if he shouldn't. He closed his eyes, feeling his brother's warm lips.

Osomatsu smiled once again and pulled away. "I love you, Choromatsu.."

The other gasped in shock. He stared at Osomatsu with his large eyes. "W-what..?"

Oso pulled away and rubbed under his nose with his index finger. "I always have.. You are my favourite brother, you know? My companion.. My soulmate. I do not really need anything else but you."

Choromatsu continued staring at the other. He snapped out of it and yelled at him. "You're seriously cuffing me to confess?! What the hell! W-w-we're brothers!"

He raised a brow. "What made you think I would care because of that? Right now, you are being adorable so.." He grinned. "I wanna have fun with you, Choro~"

Choromatsu gasped and stared at him in shock. "W-wait.. Osomatsu! Osomatsu-niisan, don't!"

Oso only chuckled and grinded his hips against the other. He leaned in to lick and suck on his hard nipple until it was red.

Choromatsu gasped and moaned out his protests. "O-oso- n-no..! W-wait..! N-not there! Those are sensitive!"

Osomatsu grinned and pulled away. "I made them sensitive.."

Choromatsu raised a brow and looked at him, confused. "What..?"

Osomatsu chuckled. "Well.. Every other night, I touch your body, you know.. I always poke and pinch your nipples and rub your crotch.. You are adorable when you sleep."

Choro gasped and turned red once again. "W-what?! You sick pervert! Why the fuck did you do that?!"

Oso hummed. "Well.. I learned some tricks from someone.. He always touch me at night so I wondered how it feels like.. But now, I know that watching you squirm and moan in your sleep is adorable.." He grinned. "I'm sorry, Choromatsu.. I'm kinda sick in the head. You became my object of satisfaction. Even porn does not compare to you and your moans."

Choromatsu stared at him in horror. "W-wait.. You.. You were touch by.. by.." He bit his lip. "W-why only tell me now? Does.. Does anyone else know?"

He is clearly not sorting his priorities right since he asked the question as he was cuffed on the floor with a mini skirt on but Osomatsu is his closest brother so hearing this shocks him.

Oso shook his head. "No.. But I already moved on from that.. It does not matter now..." He grinned once more. "What matters now is your position, Choro.. You are forgetting that we are roleplaying."

Choro glared at him. "You.. You're fucking impossible. Why didn't you just tell me, you idiot!"

He chuckled. "I know you would punch me or run away so I cuffed you." He leaned in once more to kiss on his belly and his crotch.

This made Choromatsu flinch. He already has a bulge since earlier but it certainly is rock hard now, after all that nipple teasing. It is like his own body is betraying him and it only responds to Osomatsu. It scares him but fuck, does it feel good. He made a small yelp when his cock bounced out of his underwear after

Osomatsu pulled the garment off. The older one started stroking and teasing his tip. He pulled out a bottle of lube from his pocket and poured some on his fingers before squeezing one in Choromatsu's entrance.

Choro gasped and gritted his teeth. "W-wait.. T-that hurts a bit..!" He never fingered himself before so it felt like something is stabbing him.

Osomatsu smirked and shook his head. "No, it doesn't.. It feels good, Choro.. There shouldn't be any pain." He pulled his finger out and pushed it back in, repeating the process. He also made a circular motion with his finger to loosen Choro up a bit for the second finger.

Choro was moaning and whimpering out. Once again, he is confused about what the other said. It shouldn't hurt? What does he mean? Did he finger me before?! I would be a heavy sleeper then! But I shouldn't be! He dug his nails in his own palms when he clenched his fists. He was already panting heavily. I shouldn't be enjoying this.. But it feels good!

Suddenly, his eyes widened, his mouth made a long, loud moan and his back arched. Osomatsu hit something inside his anus that made his body tingle and feel weak. "W-what was..?" Was that the prostate that the BLs are talking about? It feels so fucking good!

Osomatsu smirked and continued prodding that spot before slipping another finger inside. Choro's moans are making his cock twitch like crazy. He needs to prepare him quickly.

Choromatsu's back arched once more. The addition of another finger hurts but he felt pleasure again when Osomatsu poked his sweet spot once more. "A-ah..~ O-Osomatsu-niisan.. N-no.. Th-that feels too good.. S-stop.. Th-this is wrong.. ah!"

Oso chuckled and started making scissor-like motions with his fingers to stretch him out, remembering to his Choro's spot now and then. "But Choro-chan~ Your body and your moans are telling me otherwise~ Besides, Idols normally do this for a high price, you know."

Choro groaned and shook his head weakly, trying to breathe evenly. "N-no.. I-idols don't do lewd things..! A-ah.. Y-you did something to me.. You did it to make me feel good..!"

Osomatsu chuckled and shook his head. "I only teased your nipples you know.. And rub your crotch. You never came during those nights. All of these. You are feeling them yourself. Your body is naturally responding to me, Choromatsu." He pulled his fingers out of his younger brother to unzip his own pants and pull his cock out.

The younger one was stunned once again. I-I'm feeling those myself..? T-that can't be.. I-I'm attracted to girls..! Not to guys and not to my brother, no less! S-so why..? H-have I been homosexual this whole time..?

He was pulled back in to reality when Osomatsu shove his dick in his entrance. Choromatsu gasped and cried out in pain. "A-aah! Th-that hurts! P-pull it out, niisan!" He started kicking but to no avail. His legs are as good as frozen. His knees are too weak to move. W-what's happening to me?!

Instead of replying to him, Osomatsu slowly started to thrust his cock in and out of him. It seems that he have put lube on his own cock since is does not hurt that much for Choromatsu.

Once again, Choromatsu screamed out of pleasure when his brother hit his pleasurable spot once more. His wrists are already red because he was pulling on the cuffs too much. "S-stop.. n-niisan..!" He panted out but his body betrayed him once more when his hips started bucking wildly. He felt the need to release. His struggling has stopped long ago as his legs are spread as wide as they can, wrapping themselves around Osomatsu's waists. "N-niisan.. Niisan..! aah~ I'll go crazy..! I-I'll cum..! S-stop!"

Hearing this only made Osomatsu thrust harder and faster on his prostate. His eyes are clouded with lust, accompanied by his perverted grin. "I'm gonna… cum too, Choro.. Let's cum together.."

Choromatsu lost it when he heard Osomatsu's raspy voice. He gasped and moaned out as he came on his chest. His body shook from the ecstasy that his orgasm left on his body.

Osomatsu grunted when he felt Choromatsu tighten around his cock. He gave it another thrust before releasing his own load inside him. He panted and leaned over Choromatsu.

Choro was also dazed, staring at the ceiling, thinking about what they just did. He moaned when he felt Osomatsu's lips on his neck, kissing and licking on it as if he was apologizing in his own way. He looked at Osomatsu and frowned. "… Uncuff me.. Please.."

Osomatsu smiled a bit and pulled away. He pulled out a key from his back pocket. He unlocked the handcuffs and inspected the red marks around his wrists. ".. Wow.. They are pretty red."

Choromatsu growled and sat up despite the pain on his lower back. "Whose fault do you think it is?!" His fist bumped on Osomatsu's chest but it was weaker than his normal punch.

Osomatsu faked his pain nonetheless. "O-ow..! That's cruel~! Niichan did all the work, you know?"

Choro growled weakly and sighed in defeat. He always gets whatever he wants and it pisses me off. His ignorance and selfishness knows no boundaries! He grumbled. "You should NEVER tell this to anyone!"

Osomatsu chuckled. "Which one? The fact that you have been fucked by your own brother or the fact that you loved it?"

The younger one blushed and screeched. "Both, you fucking dumbass!"

Oso cooed. "Aww~ You didn't deny that you loved it! Niichan is happy~"

Choro growled at him. "Fuck you! Delete it! Delete the picture right now!"

Osomatsu chuckled and nodded. "Okay~ Okay~" He pulled his phone from the desk and tapped on it.

Choromatsu wanted to make sure that he deletes it so he peeked on his phone. He furrowed his brows when he saw a blurred picture. "W-what is this? Where's my picture?"

Osomatsu chuckled. "THIS is your picture~ I can't really hold the camera still, you know? You were fuming in front of me. You might knock my cellphone out of my hands. I just bought this thing."

Choromatsu blushed deeper and bit his lip. He blackmailed me with nothing! I could kill him here and bury him. No one would know!

He was snapped out of his thoughts when Osomatsu kissed his forehead. He blushed and looked up at him. "W-what..?"

Osomatsu smiled at him gently. "I love you, Choro… I enjoyed every second of it too!"

Choromatsu was completely red at this point. "SH-SHUT THE FUCK UP, USELESS ELDEST BROTHER!"

A/N: Okay, realtalk. It is hard to write a consensual first time when it's Choromatsu. I am so sorry if Osomatsu is too much but the doujins about him, manipulating his younger brothers always come back to me.. Please review! ／(* o *／)≡(＼* o *)＼\