Demon Slayer: Kimetsu No Yaiba One Shot

AU: Muzan Kibutsuji

Muzan Kibutsuji is a cold, rich and powerful businessman. He is extremely workaholic and is very harsh on his employees.

He claims that he doesn't waste his time on doing unnecessary things, such as falling love. This has been the case for over 5 years, when he started out his company.

However, everything changed when Muzan came across a beautiful girl whom he instantly fell for. And that girl was you, Y/N L/N.

You came from a poor family background. Your father died while drunk driving which lead to your mother being in depression and eventually commiting suicide with your unborn younger sibling.

You were only 12 when you lost your family. After that, you were forced to live in an orphanage till you were old enough to live on your own. Life wasn't any better back then.

You were constantly bullied but you never said anything about it. Now that you were 20, you started to live on your own. But, you were unemployed.

You were walking around your neighborhood when you overhear your neighbours talking about an interview at a huge company. You debated and went for it.

As you arrive at the company known as MZ Moon Corporate, you were awed by how big the company really is. You then suddenly had a thought. Maybe you're not suited to work here.

Because looking around you, everyone seemed like they came from a high social status except you. Nonetheless, you still manage to be hired as said by Muzan himself.

Your Pov:

It's been about a year since I started working at MZ Moon Corporate. I'm really grateful for Mr Kibutsuji to hire me even though I'm curious as to know why.

"Ahem, L/N-san" I turn around and see my work colleague, Douma. "Douma-san" "Mr Muzan require your presence" I nodded and went to Mr Muzan's office.

I knock on the door and entered. "Mr Muzan, you called for me?" I ask. Honestly, I've seen Mr Muzan a few times but never really his face. It's always a silhouette of him. The chair turned around and my heart started to beat faster than usual.

What's wrong with me? But at least I manage to finally see what Mr Muzan really looks like. "Y/N L/N, you have been here for over a year is that correct?" He ask. "Y-Yes Mr Muzan" Geez, why did I stutter?

Though if I have to admit... Mr Muzan is a little intimidating. "Good. Then here is your salary" says Mr Muzan as he puts an envelope on the table.

"Ehh? I-I thought you usually give towards the end of the year?" I ask with confusion and Mr Muzan chuckled. "You are an exception because you have caught my attention" He says.

I know he doesn't mean anything but I felt my cheeks burning. I nodded and immediately went to grab my salary. I then check the amount and smiled. It'll be enough to pay up my rent. "Thank you very much Mr Muzan" I said and bowed to him.

"In exchange" He slowly says. "Go out with me" I had a shock face. I didn't want to think much but... Is Mr Muzan asking me out? "So? Your reply?" Mr Muzan ask, snapping me out of confusion.

"S-Sure Mr Muzan" I said and he smiled. A genuine smile and I was surprised but I like his smile. I heard from the others that Mr Muzan is a coldheart and rarely smiles. "Then it's settled. This Saturday 6pm. I'll pick you up" He says and you were dismissed.

- Time Skip: Saturday -

It's Saturday and I am extremely nervous about going out with Mr Muzan. I mean, he's my boss for goodness sake! I tried calming myself down by doing some deep breaths.

* Crash *

My eyes widen as I turn around. "W-What was that?" You mumbled. You tiptoed to your door and place your ear on the door. You were afraid. Worried that it may be robbers.

"W-What do I do?" You mumbled with fear. You jolted when you heard liud banging. Your eyes widen with fear. You grab a baseball bat which was your father's, prepared to swing at whoever barges in.

You swallowed your saliva and opened the door. You screamed when you realized that the creature in front of you was a monster. You hit it with you baseball bat but had not effect. "N-No..."

Normal Pov:

"Muzan-sama, the car is ready for you" says Douma. "Excellent. I shall be off. Keep an eye out for those lurking around" says Muzan "Understood" says Douma and he vanished.

Muzan then makes his way to your apartment. Of course he'd knew, he's your boss. When he was near your apartment, he stopped his tracks. "Blood..." He mumbled.

He immediately rushes to your apartment only to see that your house was in a mess. "Y/N!" Muzan called but you didn't response. You were too weak to.

"M-Mu... Zan" You mumbled softly but Muzan heard it very clearly. He rushes up and his eyes widen when he saw you lying down on the floor with a puddle of your blood. "Y/N, what happened?" Muzan ask.

"M-Monsters... Rape me... They... Killed me" You tried to say but you were slowly losing consciousness. "I won't let you die Y/N" Muzan says and snap his fingers and his subordinates, Douma and Akaza appeared.

"Muzan-sama" "Find out who did this" says Muzan. "Right away" Douma ans Akaza disappeared and Muzan turn to you while you look at him with tired eyes. "Mr... Muzan... What are you?" You ask weakly.

"I'm sorry Y/N. I'll explain everything when you're healthy" says Muzan as he pulls you closer to his chest. You smiled and mustered your strength to kiss his cheek. A bold action that surprised Muzan. "Y/N" "I... Like you... Muzan" You said tiredly and fell into a coma.

When you woke up, you found yourself faced with a red coloured ceiling. You slowly sat up and you realized that you were recovered. "Good to see you awake"

You immediately smiled. "Mr Muzan" "Just Muzan is fine. You feeling alright?" Muzan ask while he placed ine hand on your cheek. You gave a small smile and held his hand. "I'm fine" You said.

"That's good to hear. And Y/N... I've got something to tell you" says Muzan with a serious tone. "What is it?" You ask. "You're no longer human. I'm actually a Vampire Lord" He says.

Muzan was actually expecting you to be scared but instead, you surprised him with a peck on the cheek. "Whatever you are, I still love you" You said and Muzan smiled.

"I love you too Y/N and I promise to protect you" He says and pulls you into a hug. You smiled and hugged him back.