I forgot the warnings and disclaimer at the previous chapters, sorry.
Warnings: Angst, swearing, violence and graphic illness.
Disclaimer: Sadly, I don't own Ao no Exorcist/Blue Exorcist.
Rin watched in shock as blue flames licked his skin.
Shock and glee flashed through the King of Rot's face.
"My Prince! I knew it was you! Those blue flames-! There is no mistake!" Astaroth grinned and grabbed Rin's wrist.
"Wha-!" Rin tried to pull away but the King of Rot have an iron grip.
"I'm taking you back to Gehenna. Satan will be so pleased that his son had come home!" The demon laughed, his sharp teeth showing.
"WHAT THE FUCK DO SATAN HAVE TO DO WITH THIS?! LET GO OF ME YOU BASTARD!" Rin screamed.
Astaroth kneeled in front of Rin, "I am Astaroth, the Demon King of Rot and Decay. I am going to take you back to Gehenna, my prince."
Footsteps caught the King of Rot and Rin's attention.
"Mischief is in their hearts,
Give them according to their deeds,"
Astaroth snarled, "Damned exorcist!"
"And according to the wickedness of their endeavors,
Give them after the work of their hands, render them to their desert.
Smite them and let them not rise again."
"I'll kill you! YOU EXORCIST!" The demon ran towards Shiro and tried to punch him, but Shiro grabbed Astaroth's wrist and judo flipped him.
"Blessed be the Lord.
The Lord is my strength, and my shield.
Thou shall perish!"
Shiratori screamed, thousands of coal tars escaping his mouth. His eyes rolled at the back of his head and he passed out.
Rin just watched in shock as Shiro exorcised Shiratori.
"D-dad?!" Rin yelled, "What just happened?!"
Shiro looked grim as he grabbed Rin and dragged him to the monastery, "There's no time Rin."
=UNSEEN=
As Shiro slammed the doors open, he immidiately started ordering the clergymen to lock the doors and windows. Shiro hurried and disappeared behind the podium and came back with a sword wrapped in red cloth. He gave it Rin.
"Old man! What the heck going on?! What happened to Shiratori earlier? And why are you giving me a sword?" Rin asked angrily.
Shiro grabbed Rin's shoulders and looked at him in the eyes.
"Rin...everyday I prayed this day will never come but I guess you can't avoid destiny." Shiro sighed, "That sword is called Kurikara, it's seals your flames and demonic heritage. And that thing that attacked you earlier is a demon."
"Eh? What?" Rin faked a laugh, "You're not making any sense Old man! There's no such thing as demons!"
"Rin!" Shiro yelled, his face clearly showing that he's not kidding. "I'm serious Rin. I'm not kidding or pranking you. That was a demon, and the reason why it want to take you to Gehenna," Shiro paused, "is because you're the son of Satan."
Rin stiffed. He tightened his hold at the Kurikara.
"Your abnormal strength, your uncontrolled temper, and those azure blue flames...you're the son of Satan, Rin."
Rin trembled. All this time...the people around him were right? He really is a demon?
"Bu-but what about Yukio? He-he's the son of Satan too." Rin choked out, his throat becoming uncomfortably tight.
"Yukio is one hundred percent human. You're the only one who inherited demonic traits."
Rin felt betrayed, he wanted to cry.
"Why didn't you tell me?" Rin pushed Shiro away, "Did Yukio know?"
Shiro didn't answer but his face showed it all. Rin closed his eyes tight.
Shiro tried to grab Rin but Rin flinched away.
"Were you secretly happy when you found out that I'm dying?" Rin whispered.
"No Rin-"
"DID YOU EVEN LOVED ME AT ALL?!"
SLAP!
Rin held his cheek, tearing up.
Shiro's eyes widen, "Rin! I'm so-"
Drops stained the floor.
"I hate you."
Time seem to stop for a moment .
Blue flames erupted around Shiro, his ears lengthened and teeth sharpening. He uttered some demonic language and a horrifying gate with twisted inscriptions appeared. Unknown dark sludge came out of it. Body parts littered the seemingly inescapable and disgusting sludge.
An insane laugh escaped Shiro's mouth as Rin stumbled back in horror.
"Well, well. Look who it is! It's my beloved son! It's been so long since I've seen you! You've grown!" Shiro-no this is not his Dad-Satan opened his arms and grinned.
"Come give your papa a hug!" Blood streamed down Shiro's face but that doesn't stop him from grabbing Rin's arm.
"I'm not your son, you bastard! Let me go!" Rin tried to pull back his arm but Satan seem to ignore him.
"It's time for you to come back home, son! It's an event to celebrate!" Satan grinned in triumph when they reached the gate. He threw Rin into the sludge.
"You bastard!" Rin said, but it came out as shaky and weak. He was slowly sinking into the dark sludge and body parts.
Suddenly the grin on Shiro's face faltered. The redness in Shiro's eyes suddenly disappeared.
"This...is my son! And I won't let you have him!" Shiro's voice resonates through Rin's very core. Shiro ripped his blade from his hip and aimed it at his stomach. Blood spurted out of the wound. The blue flames around him sputtered. Rin's eyes widen.
Rin gritted his teeth, his eyes full of determination. He grabbed Kurikara and removed the sword from the red cloth.
"I WON'T LET YOU DIE!"
Rin unsheathed the sword.
Blue flames erupted around Rin as he stabbed the gate. The blue flames engulfed the gate and blinded Rin, making him close his eyes. But he paid it no mind, because for the first time in his life, he felt good. Not feeling the fatigue and tiredness because of the goddamned disease.
As he sheathed Kurikara, the flames died down, only then did Rin open his eyes. The first image he saw was Shiro's bloodied body. Rin clenched his eyes shut. Tears fell from his eyes, one after another. Sobs echoed through the monastery.
Rin's chest seized up and he coughed up blood. Rin's eyes widen. Blood escaped from his nose.
"Shit..."
He collapsed besides Shiro's unmoving body, choking with his own blood. More blood splattered at the floor. His whole body trembled and shook. Tears continued to stream out of his eyes. It feels like every part of his body is being stabbed. His hand lets go of Kurikara.
He whimpered.
Why?
The disease...it's worse than before. Is it because he unsheathed the sword?
He can't think anymore. He tried clawing at the floor. He can't breathe.
The last thing he heard was Yukio's faint voice calling out his name.