Notes:

The Kuroshitsuji part (Sebaciel part) will be the most important but it starts with Supernatural and the intervention of the characters from it will be very important for the Sebaciel.
Also I already finished the story (almost actually I only need to finish the last scene) but wanted to know if you guys would like it so I will post in in like 4 to 5 chapters ^^
Please tell me if you like it ? very anxious here
(also looking for a beta, english is not my first language)

Chapter 1: Brother times

Chapter Text

It was raining before those important events happened and nothing indicated that it would be anything more than a regular day. Castiel was at the bunker that he now called home, watching a tv show on netflix.
And it was bad... Like really bad...
Right to the plot and dialogue to the actors's act.
They were all over acting and those noises the woman was making were so exaggerated it sounded like that bad pornography he watched those six years ago, that one with the baby sitter and that pizza man.
He still remembered their noisy sexual intercourse and comparing it with his loving yet non less passionate embraces with Dean, it was nothing.
.. Just like what was going on between those cheap actors.
Castiel sighed, he loved Dean but Doctor Sexy was a stupid tv show...
He fought the urge to stop it all and watch something more worthy of his netflix time but he wanted to understand what Dean saw in this show and the remote was too far away on Dean's side of the bed anyway.
The angel was grumpy and lonely without Dean who was on a hunt with his brother and after so many netflix programmation's arguments he decided that today he would pierce the reason why Dean appreciated it so much.
So far he got nothing.
That's when he heard a laugh, he thought he was just imagining things to get him out of his boredom and frustration when a familiar face appeared on the screen in place of that stupid doctor.

"Gabriel!"
The archangel now wearing the white blouse and cowboys's santiag was laughing in his regular annoying way.
"So you don't see why Dean enjoy this show baby brother?"
Castiel rolled his eyes
"You are stating the obvious Gabriel"
"Isn't that obvious too? Everything is shitty there, but there's that dark haired doctor with stubble and geek's appealing clothing and shoes. His name is even "Sexy" and it's in the frigging title"
Castiel looked baffled for a moment and the archangel thought he never laughed that hard in his entire life, even when disguising as Loki playing pranks on people. But Cas's expression was really priceless, the best ever.
"You mean Dean "likes" this doctor?"
"Dawww you are so cute baby bro. Yeah he has this crush on that doctor sexy."
Cas now looked appalled which made gabe laugh even more
"You kinda looks like him, deano got a type it seems"
"Me? You mean I look like this.. This..."
Out of words, Cas was offended by the comparison, it was a riot for Gabe
"Nah, you are classier bro, not like this cheap doc. But you have to admit you share some obvious characteristics. Dean just like the idea of the guy, that's all"
Vexed Castiel finally took the remote and turned off the screen.
Gabriel then appeared in the room rather than in the screen.
"You're so fun to rile up"
Castiel was now crossing his arms
"Anyway by all means what are you doing there Gabriel? Is there an emergency?" He asked awfully looking like a brooding teenager.
"Oh no I am just there because I miss my most angelic yet rebellious brother that's all. Dean is taking all your time now."
The dark haired angel looked at him without saying anything.
"Come on grumpy kitty I'm just saying I want us to have some bro time!"
"Bro time" repeated Cas, ignoring the silly surname.
"Yes, you and me, hand in hand doing something together, enjoying our time!"
"Well..."
It looked like Cas was searching for an excuse so Gabriel cut him shortly.
"It's not like you have something better to do anyway", Gabe motioned toward the tv, "unless you got this crush on doctor sexy too because if you want to have a kinky threesome with Dean... I could even help ..."
"Gabriel !" Castiel almost shouted
but his brother just smirked.
"Okay Gabriel, I would like to have some of those "bro times" with you but you will refrain for making those uncalled suggestion/comments"
"But where would be the fun in that?"
Castiel just decided to ignore this.
"Where would one go for those 'bro times'?"
"Ah don't be so stuck up, it can be everywhere, it's not like there's a 'bro time complex' or something! We could stay there like two gaudy bro or go to a bar or a brothel, he saw Castiel shook his head no, go to swim in Hawaii or even go back in time when they invented it or in another dimension... Anywhere... Ah that makes me think... Okay it's settled we'll even let fate decide this time ! More fun ! Come baby bro!"
Gabriel was reaching out for his shoulder but Cas stepped back.
"Wait a moment, I need to leave Dean a note."
The angel took a pen on a console and started writing a note on a pad. "We had arguments with me leaving the house using my "mojo" without telling where I was going and when I was coming back home." He explained.
Gabe chucked
"On a scale of 0 to 100 how married are you? "
Castiel ignored him and left the note on Dean's nightstand, re-buttoned his jeans, unwrinkled his clothes and put on his trenchcoat.
Satisfied after those simple preparations the angel simply nodded and said
"I am ready now"
Gabriel rolled his eyes, put his arm around his brother and closed his eyes, trying to not think of one destination in particular while thinking of thousand of them, his version of pointing blindly with a map, then he stopped suddenly and left the floor to fly toward the energy he was summoning, dragging his brother with him.
They arrived in a very crowded place and Gabriel silently congratulated himself for making them imperceptible because it would have made a commotion for them to appear out of nowhere.

Castiel looked around. They were still on Earth and in the center of London if he weren't wrong. And it was the 1800 or so
"It's 1891 Gabriel said matter of factually, we are in Piccalidy. Ah London... I had very good times there, surely why a part of me choose it. "
"Why 1891?"
"Ah baby bro you don't travel enough. 1800's is all about the repressions, it is very interesting, all those feeling inside and those suffocating rules, of course people will just blow up !"
Castiel glared at him and gabe shrugged:
"Don't look at me like that, any psychologist would say that! Don't be so grumpy, we are in London ! Back in time it's great we're going to have an awesome bro times ! Where do we start? Heh I feel thirsty after this long journey we should find ourselves a boozer to get in the mood!"
"This journey was nothing to you, Gabriel", cas reminded the archangel
"So what I can't go drink, quit the "grumpy angel face" bro, smile a little I saved you from that cheap show after all"
Cas smiled slowly at his exasperating yet lovable brother, he always was his favorite even if he wouldn't tell him that.
"Okay then I'm following you wherever you think fits"
"Let's go !"

They walked a bit around,Gabriel joyfully searching for the worst bar they could find and Castiel observing around, he remembered those times but he was so far away from humanity then, it was like he never lived it.
He thought he liked the clothes they were wearing. Clothes were a very important matter to humans, it showed their social statu or their personality, it gave reputation. it could also be used a sexual stimulator, he saw some costumes/suits he would like to see on Dean, he thought they would fit him. It made him think of doctor sexy and what Gabriel said about it. Dean liked the way that doctor was dressed, his style, the white blouse and those santiags...
Cas still remembered Dean's obssession for those cowboys. Maybe he could try on a doctor set up santiags combo someday to see if it would turn this stupid show to his advantage...
He was thinking that when he felt a pang in his heart, something that felt like a deep desesparated longing. He used to feel this very frequently before he and Dean realized and amitted their feelings for each other and over time it was remplaced by warm comforting feelings of love inside. It couln't be them, they were happy now. This was coming from someone else...

Cas looked around him more, looking for the person that was emitting such a strong feeling.
He observed this poor man polishing some gentleman's shoes but it wasn't him, nor the gentleman who was reading the newpaper or the group of ladies drinking tea at a terrasse or the old man with his grand kids.
But behind a pile of packets a domestic was holding, he saw him, the reason behind this ocean of sadness and frustration and love.
It was a teen, almost a child, he looked expressionless yet his chin was high, his right eye was hidden by a black eye patch and he was walking with a walkstick without a need for it or maybe just the need to hold onto something tangible to not drown in the ocean of torments inside of him.
It was violent, Castiel as an angel was (empathic) and he could feel everything at once, it was more than for any person he ever saw.
This child has suffered more than most adults had in their life and was still suffering.
There was something more about him, Cas didn't know what yet, it was difficult to concentrate with all this.
Then the domestic stopped near them and Cas could see why, a carriage was waiting for them.
The tall dark haired butler deposed the packages and opened the door for his master, he held a hand for him like any domestic would but then, at the moment his hand touched the youngster all the feelings intensified and started dancing the conga, if Castiel thought it was intense before now it was overwhelming.
But now it was clear as he watched the two interact in those slow seconds between when the butler's hands so possessive on his master's hand and waist, the tension between them yet the confort they were giving the other.
He could almost feel it on his tongue now, love.

It was love and not just familial love nor it was friendship it was the most dangerous kind of love, romantic ; passionate, intense, burning love. They were in love. Both of them and yet suffering withdrawmhal fron non expressed love.
There was not just that in that teen's hurted heart but it was taking the bigger part of it. Castiel then concentrated on the butler and shivered when he felt it.
Oddly enough he hasn't noticed it before now. It was a demon, Castiel was shocked, generally he could feel them feet away without even looking but yet he missed that one.
It was a mystery. Or maybe it wasn't, Cas pondered, in his knowledge demons didn't love, except for Lucifer that still loved their father and would always do but his creations were different.
This demon was different, he could only tell he was a demon because of his specy, he could see his true form if he concentrated it was something natural for angels and of course he could see black smoke in his past looking closely at him but it was far away, it was weird like at some point the demon changed his way and continued like everything was normal...
And there was love, lot of it, for this blue eyed teen, for this life and for... Cats?
Castiel could see this demon really loved felines, he knew Dean loved cats and was frustrated with his allergies, the human could not lie, Castiel has seen those cute videos of cats in his youtube history, humans adored cats. It was very human to love cats.

"Look what I found ! Those are fantastic, want one?"
When Gabriel talked far away he realized that he stopped walking a while ago to observe the odd couple.
He turned to see his brother affubled with an ugly hat covered in ribbons and munching into a big pastry. He found himself with one too, Gabriel almost forcing it down his throat, he bitten into it and it tasted good at least. Of all things Castiel could understand Gabe's love for sugary things.
"What were you looking at?" Gabe finally wondered, he looked toward the carriage, the butler was tending to the horses and his careless expression changed.
"Wow! Counting on you to find one hell of a couple! Jackpot! They're both fascinating !
He looked at the carriage for a while and then turned away like he satisfied his curiosity and moved on. gabriel was not unlike a child with concentration's problem, Cas thought to himself remembering this documentary he saw on tv.
"Anyway let's go, I think I found a bar that's..."
"No" Cas said simply
"...So dirty you can't even see the right color of the... Uh?" Gabe said dumbfounded.
"I have to do something for them"
Cas sounded dead serious, he got this air like he gave himself an important mission.
"The demonic butler and his cutie?"
"Yes, I... It felt... " Cas touched his heart through the layers of clothes, "he was so scared and lost screaming for help... both of them"
"Yeah I kinda felt that too bro, archangel here!"
"We gotta help them"
"Who say?"
"I do. We came here for that, I am sure dad..."
"You are not gonna say Dad works in mysterious ways to ME right?"
"Gabriel, you know it's important. We came here to have some "bro times", what better bro times than helping some distressed people?"
"Saving people, hunting things? Day after day you become more Winchester Cas. You going to get hitched soon as my calculations says, dibs on being your best man!"
Castiel glared midly but the effect was wasted by the pink on his cheeks at the mention of him marrying Dean.
Gabriel sighed deeply.
"Ah Cas... you're a hopeless romantic. Okay we're gonna help your hopeless couple but you'll let me have my fun okay!"
Then Gabriel disapeared suddenly, too fast for Castiel to see where he was headed.
"Gabriel! Wait !"

Please review to let me know if you liked it ? Thanks a lot