Author notes: I'm not a native English speaker, please ignore the mistakes. I'm an Asian. Also it's my first time writing fan fiction so please bear with my stupid writing skills. Updates may come out late. Sorry.

Warning: Yaoi, rape, sexual abuse, mpreg, characters death. DON'T LIKE DON'T EVEN DARE TO READ!

Disclaimer: I did not own Ao no Exorcist

Tomorrow will be a happy day for Rin Okumura and Shiemi Moriyama as their love will be united. Everyone is happy too but not for a bespectacled brown haired boy.

Yukio Okumura sat on the couch in the shared apartment, looking around. Everything was settled, they have been sending in Shiemi's stuff there since last week. All this gritted on Yukio's nerve, he bought that apartment so it's his and he's the own supposed to decide whether or not anyone else can live in that building. But because of a certain idiot brother who still not being able to get a fixed job other than being an exorcist that can't even afford to pay for a room, he was forced to share his apartment with a bride-to-be couple. Seriously, they both will get to married and live happily while he was shoved down to another room in the house. Not fair. When they get a child, that house will be more cramped. Good, sooner or later he will be the one who need to move out from his own house.

"Damn!"

It's really rare for Yukio to let out a curse. If he did, then he was completely pissed off. He let out another sigh and get up from the couch. Some afternoon nap might be great at this time to relieve his headache. Yukio walk past a door. In that room, Shiemi has been living with them since a week ago separated from him and his brother. Yes, he still stays in a same room with Rin. They keep their room like when they were both in True Cross. Two bed, one across the room with another. It's just lucky that both Rin and Shiemi was actually dumb, (he didn't care to said that at all) not to mention too shy with each other that even they have been a couple neither of them ever shared a kiss.

Yukio turn the doorknob and entered his bedroom. The curtains was blocking the sun rays from outside, giving the room a comfortable amount of sunlight. He dropped himself to the nearest bed, not caring whether it's Rin's or him. He's alone today, Rin was out to get a few things settled at the church and might be also coming back late doing errand with Bon and Konekomaru. He remembered they just turn twenty-four that year but Rin still looked like a teenagers. He's a half demon and he's growing at a snail pace. Rin also still act childish until now and couldn't do anything properly by himself. Yukio chuckle, it's not just Rin who start to grow at snail pace. He too have realize that since the incident with Satan many years ago, his demon blood have awaken and he start to acquiring a few demonic traits. But it's not too recognizable like Rin's. Well, he got a fang but it's just a tiny one and he didn't have a tail.

The brunette let himself think for a few moments more before sleep engulf him entirely and he fell into a deep slumber.

Blue flame, the blue flame is everywhere.

"W-what happen?!"

Yukio look around confusedly. He saw dead body and he gasp. His friends and everyone he recognized. They're all dead in the blue flame. He's trembling really badly and almost collapses as he feels his legs were giving up on him.

"Where's Rin?!"

"That's what you got when you try to interfere with my beloved son, the one who carried my blood! The blood of the god of Gehenna"

"Satan!"

"Oi kiddo, look at me!"

Yukio turning around, try to find the sources of the voice but found nothing except darkness and the flaming blue flame everywhere.

"What have you done to everyone?!" He yells desperately to the air.

Satan let out a creepy laugh.

"I don't' want my bloodline got spoiled by some weak human beings!"

"What do you mean by that?"

"That damn bitch, if she mate with Rin she will just fucking ruined my bloodline. Human is so disgusting!"

"W-what?!"

"My son, you have my blood as well. You're the only one allowed to mate with The Prince of Gehenna!"

"….!"

"Don't give me that stupid look; you think I didn't know about your desire to your own brother? I can make it real my son. Hear me and Rin is all yours. You're the only one who can create the new generation with pure bloodline. Come with me my son, I'll help you to achieve everything that you want"

Yukio didn't even realize when he reached out his hand towards the voice. All he knows was, he passed out soon after that.

"And I'll be able to kill two birds with one stone!" Satan laughs maniacally.

"Yukio, wake up!"

Rin laugh upon seeing how his younger brother looks like a mess. Yukio's hair was unruly and sweat matted his forehead. But the odd things was how he gave his older brother a weird look and just get up without saying anything. Rin trails his eyes towards the boy as Yukio goes to the bathroom. Shrugging off the uneasy feel he got at that time, he continues to change his clothes.

Yukio was back after 15 minutes. Water dripping from his bang and he headed directly to his wardrobe and took out a neatly hanged and ironed coat. He changed quietly and also stays like that when he help Rin with his tie.

Thing goes on smoothly and now they're both in the church getting ready for the ceremony.

4 minute more.

Yukio goes to his seat and stand with other guest as the bride, Shiemi walked in. For some reason, Yukio refused to be his brother matron of honor and let Bon takes the job.

2 minute more.

Everyone took a seat, eyes locked to the front where Rin stood waiting for Shiemi.

30 second more.

Rin and Shiemi stood side by side hearing to the priest. Everyone just too absorbed with the event, no one noticed when he bit his thumb drawing the blood and mumble something softly.

30 second more.

Every lamp in the church shattered suddenly. Panic start to rise among the guest as the light was placed with flickers of blue flames.

10 second more.

Satan chuckle echoed in the church. The guest desperately tries to get to the entrance but was blocked with a horde of demons. Luckily most of the guest is an exorcist, the aria start to chant and tamer start to summon their familiar. The dragoon and knight could only fight with anything they can found like the benches and the legs of the broken chair. In the crowd, Rin picking Shiemi up in bridal style and tries to bring her out but Yukio wrap an arm around his brother waist and manage to stopped him from moving. Rin gave out a confused look towards his brother only to be greeted with grins.

3, 2, 1…

A sudden explosion and the church were engulfed in blue flame. Rin saw how trails of blood start to pouring out from Shiemi nose, eyes and mouth. It reminds him of an event that haunted him before. Second after, a loud shriek resonated coming out from the said blond as her body deteriorated and turn to ashes slowly. The half demon boy could just stare in horror on what was happening right in front of his eye. The shriek stopped and what left was just a strong smell of burned flesh and ashes.

Satan gives the twins choices. Fight him and he will let all the other people go. Before Rin could say anything, Yukio agreed.

That day, everyone witnesses the twins dead and turn into ashes in Satan blue flame.