Second Person POV:

A mere second passes after you call her name, and the loud twang of her instrument sounds twice, just as expected. You, Douma, and the boy materialize within the Fortress. Your surroundings construct before your own eyes in the span of a nanosecond, leaving you breathless every time.

Once the quiet, female demon had teleported you to the familiar yet endless wooden platforms and staircase of her Infinity Castle, you pause. You state one more sentence, albeit this one far softer than the previous command you had given.

"Thank you." You murmur under your breath. Unbeknownst to you, the black haired girl heard everything you had spoken, letting her rosy lips curve up into a genuinely pleased smile that lit up the rest on her pretty, pale face.

This was exactly why Nakime immediately became fond of you after you arrived; you made small comments here and there, thanking her for transporting you from somewhere or other. Otherwise, she never got to hear those beautiful words, not even from the hardcore feminist demon, Akaza, or the respectable Upper One demon, Kokushibo.

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After only a few seconds of walking, Douma stops, so you turn to him. He takes the boy and throws him off the wooden platform, yelling, "Akaza-dono! Catch!"

You run to the edge of the platform in shock and slight frustration, wanting to see where the body would end up. Luckily for you, a second later, you see a blur of navy, white, and hot pink streaking across the vast expanse of space, catching the body in his hands. 

Akaza landed on a nearby platform, squinting up at you and Douma, who were watching from the edge of a higher place. He throws the body onto the wooden floor next to him, making eye contact with you and giving a curt nod of thanks. 

You sigh in relief, grateful that the body didn't go to waste. You technically did not kill him since he was still alive...right? 

While you were occupied with Akaza, Douma slowly inches towards you, not so discreetly attempting to slip his hand into yours. You snap your head up towards him, immediately recognizing what he was trying to do. 

You raise an eyebrow. 

"Why are you trying to be so secret?" You say blankly, grabbing his hand, which was surprisingly very cold. With an expression of amusement, you watch as his eyes change from embarrassment to shock to a cute sort of happiness, finally settling on contentment. Other than his funny expression, he doesn't respond for several seconds. 

"Your hands are warm, you know..." Douma says eagerly, bringing your hand to his lips and kissing it. It was obvious to you that he was trying to be bold to hide his sheer fluster at what you had done.

You let out a laugh, tugging on his hand.

"You're just cold." You place your other hand on his cheek, feeling how icy it was. "Really...cold." You hesitate, your gaze trailing to his eyes. You then feel him lean his head more onto your hand, a wistful look filling his eyes. 

"(Y/N)...?" He sighs, his mood suddenly dampened. Your expression softens to one of concern, shifting your position, your eyes flitting across his face for more emotional clues to what could've brought his spirits down so suddenly.

"...yes?" You say warily.

"You do remember where you are, correct?" He asks, his tone hinting at something you couldn't quite tell. You take a second to think of what he could mean, coming up with no explanation for his sudden mood change. 

"Uhm, the...Infinity Castle? Why?" You say, confused. Hearing the quiet 'twang' of Nakime's biwa, you turn your head from Douma's face to meet Muzan standing on a platform several platforms away from you. 

Immediately, you drop to the floor, bowing your head down before the Demon King, who you had full knowledge could kill you at any given moment if he so pleased.

Douma follows suit, plopping down next to you in a cross-legged position, rocking back and forth with a curious look in his rainbow eyes. Even after regaining what little emotion was left in his soul, Douma still lacked any and all fear for Muzan Kibutsuji, someone he did not deem to be a threat to his life. 

"Upper Two and..." He addresses Douma, ignoring his blatant disrespect - other than an irritated glare, pausing for a moment when his sharp eyes turn to you. He was unsure of what to call you. "...and you." He continued, a firm sigh escaping his mouth. 

"You both..." he looks you over, "mostly Upper Two, I suspect..." he continues, his voice deadpan and sharp. You sweatdrop, completely unappreciated for your work. You didn't like the fact that he was right - the fact that you did not, in fact, help to eliminate the majority of the Pillars. "...actually managed to terminate the Hashira. All of the Hashira."

The surprising words of the Demon King did not go unnoticed. You couldn't help but glance up at him to see if his hardened expression had changed, even for a moment. It had not. You weren't surprised, however. You return your eyes to the floor, and you couldn't help but let a small smile cross your face. 

"...good work." Muzan admits reluctantly. After a brief pause, you hear him continue. "You will both be rewarded with my blood." 

It was at that second that it finally dawned on you what he meant. "Both?" You repeat quietly, your gaze shooting up to look at his face. His expression remained passive. 

Your eyes frantically search him for any sign of sarcasm or humor, though you knew you'd find none. You begin shifting your weight back and forth, not understanding what was going to happen. Douma looks over at you, then at Muzan, visibly confused. Douma hides his confusion with a grin of relief, starting to laugh. 

"Muzan-sama, what a hilarious jok-!"

"I'm not joking. Did you expect me to keep a human here when it has proven its usefulness as a demon?" He raises an eyebrow, an amused grin twitching at his lips. 

Your blood runs cold, and your vision begins to blur. 

"W-wait..." You choke out, your voice hoarse. You wouldn't be able to handle his blood, no matter how little it was. You would die on impact.

"Wait!" You scream, just as you feel an excruciating amount of pain in your arm. You manage to turn your head to your side, and the last thing you see is a giant black thing attached to your arm. You hear Douma let out a yell of surprise.

Everything goes black. 

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Hello there.

You jump up, immediately opening your eyes and becoming aware of the pitch black darkness around you. You stay silent, your breathing becoming erratic as you reach up and pat down your cheeks. You feel the lack of warmth of your face on your fingertips, but you ignore it. You press your hands against your eyelids, rubbing them over and over again. 

What are you doing?

You freeze. Finally, you acknowledge the voice. 

"...who are you?" Your voice echoes out into the distance repeatedly, making it sound almost unrecognizable to you.

I am everywhere.

You pause. Well, that wasn't helpful. Before you could think, the strange voice continues to speak.

I have a proposition for you.

You place your hands over your eyes to comfort yourself and pretend you weren't surrounded by darkness in all directions. "A...proposition?" You say hesitantly. "Why would I need a proposition? Also, where am I? Why can't I see either!?" Your speech becomes quicker and quicker with panic as you ask more questions. The voice goes quiet for several moments.

You were killed. 

Your breathing stops. You stand there, a chilling wind sweeping past you. Your heartbeat thrums in your ears and you become eerily aware of how silent your surroundings really were. 

You've done the impossible, you know. You tamed a powerful Uppermoon demon and won over the affection of the demon species.

You pause, shaking out of your utter shock at the revelation that you were apparently dead. You wouldn't take this experience too seriously, after all, you were quite the vivid dreamer. Within your soul, you knew it was true, but you really, really didn't want to believe you had died over something as utterly pathetic as that.

"I...have?" You reply with intrigue in your tone. 

You literally kissed one of-!

sigh

Anyway, as I said, I have a deal for you. I will revive you, but you do not kill another human. You will be unable to transform into a demon, but you will be immortal. 

You stay quiet for a moment before speaking once more. "This feels too good to be true. I don't even want to turn into a demon, and not murdering people seems pretty easy to me." You reply.

I was getting to that, you impatient human. You do not murder, and you will be revived as immortal. You will not die of sickness, nor of old age. However, you will still be susceptible to murder, or if you so choose, suicide. 

You pause. "What's the other catch?" You ask. 

I WAS GETTING TO THAT. LET ME BE MYSTERIOUS, OKAY!?

another sigh

You will be the guardian of the Spider LIly. You cannot ever share this information with the demons, nor the slayers. No living being can know about this. The flower will be stored in your lungs, resulting in a condition similar to Hanahaki.

Your shoulders lower. "So I'll cough up more and more blood until I die again?" You ask.

Not quite. You will not die from this, it will merely be a side effect of guarding the flower. However, if this information is ever spread, you will die. You will not have to fall in love, as you already have, have you not?

You freeze, a hot feeling spreading across your face. "Uhm...I mean, kind of? That's not really the way I'd describe it...we're not quite...y-you know what? Sure, yeah." You stutter. After a long pause, you speak once more. "But...why me?" You ask.

I'd like to see how your life plays out. It's...entertaining to watch, and I don't want my little show to end just yet.

You suck in a sharp breath, trying to process all of the new information you had received.

"So...I'll be revived, and I can't die of old age, nor sickness. I will never turn into a demon, but I cannot kill humans. I'll be the guardian of the Spider Lily that Muzan wants, and I cannot tell a soul, otherwise I'll die. I'll cough up blood, but that is all?" You recap.

It'll also be extremely difficult to breathe at times. It will be painful, but the flower will be your life source. It will result in a codependent relationship. The flower will grow inside of you, causing the leftover petals to be discarded. In turn, the flower will be your life force and enable you to live. 

You let out a long, drawn out breath you didn't know you had been holding in. "Will the demons be suspicious of how I survived?" You ask. 

That part is not my problem. Just say your body rejected it or something. Cough up some blood to make it believable. 

You think about the proposition for several moments. "Deal." You say firmly, opening your eyes to the darkness to find an eye floating before you. It blinks at you. 

See you on the other side, (L/N) (Y/N).

Word Count: 1973