au where everything is black and white until you meet your soulmate

ADDITIONALLY: when your soulmate dies, the world goes back to black and white

Lu- Chiliarch

Ciel-Royal Guard

Before Ciel had met Lu, his life was nothing but black and white. Everyone who he met that was friendly towards him who he had spoken to about told him that the colours would come to him one day. He didn't believe them to some degree, but was fine if it never happened either way.

That was, until he had met Lu. Colours had come into his life when he saw her injured body, and as he helped her recovered he could tell that something similar had happened to her too, but he had never questioned it.

As he was dying, the colour was slowly fading out of his eyes, not wanting the lovely shades to go. Suddenly the colours were granted back to him, and they stayed after they had made their deal. Behind all the emotions he was feeling at that moment, he was glad to have made the deal with Lu.

Getting used to the colours took a while for the two- or more or less Ciel, he never understood and continued to not question her, as well. Their world got more brighter as they continued on their adventures and meeting the others. Despite that, the colours would always stay, as Ciel and Lu were bound together through their bond.

The female demon had soon progressed into a Chiliarc, and Ciel a Royal Guard. However, Lu had noticed something funny about Ciel, black and white flickering into her eyes, and had questioned him, but he shrugged it off, saying it was nothing. As time went on, the process repeated a few times, and Lu would always question but Ciel would continue to shrug her off.

He would never tell her how despite how he was half demon didn't mean it would always mean good things for his human half. He would never tell her how every time she would question him, he would be coughing up blood, but quickly hiding it before she noticed.*

As Lu was picking a cake out one day for Ciel, focused on picking which delicious one to pick out, her eyes had flickered black and white for a brief moment. She pursed her lips together, thinking that Ciel had badly injured himself somehow and needed a scolding and tending to when she got back, but after that thought, the colour had shut out, replaced by black and white.
A strangled noise that was meant to be his name came out of her mouth as she ran out of the cake shop, straight to where Ciel and Lu had been resting. She slammed the door open, tears pricking her eyes as she searched for the male. She had found him on the ground face down at his writing desk, a letter beside him. She shook him and called out his name a few times before turning him around, gasping at the blood that had dribbled out of his mouth a little as she did so.

Lu grabbed a tissue box, the tissues to clean up as much blood as she could as well as to wipe away her tears. She stroked his face with one hand and picked up the letter with the other shaking hand, wiping away more tears that were coming out with her arm before reading.

'Lu,

I'm sorry I never told you about what I was going through. Why, what I assume, we both saw grey every now and then and you would question me to no success. To tell you the truth, my human half was slowly losing the ability to hold on, and I was bound to die in due time. The demon half was never meant to help keep me alive forever, I'm not a full fledged demon like you, my dear Lu. That half was only meant to give me power.
I know, you never ordered me to die, I don't think you'd ever want to. But now, my time has come, I am so very sorry, please forgive me.

I l'

The rest was cut off, pen scribbling down and a little blood on the page.** She pouted, more tears spilling from her eyes as she threw the letter to the ground, burying her head against his chest and letting her despair out. "Ciel, you idiot... Of course I wouldn't have ever ordered you to die... I hate this black and white..."

It had taken a long while for anyone to get Lu to move from Ciel's grave.

Sorry for the wait, folks! Procrasting via Voidels and Tumblr is always fun, especially when you put off writing the rest of the prompts you wanna do and a request to do as well (which I will get onto).

* This was actually based off of a post from Tumblr! FFNet is being dumb and wont let me link so idk man

** Cliche, I know. I can't help it.