Kimetsu No Yaiba x Reader ! {Oneshots}

A "Mission"//Muzan

Credits to Deathbringer for the one-liners!!  <33
Next up after this are two chapters (a.k.a. someone's requests.)
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Alsoalso Muzan's a flirt here. Warning.

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"A what?!"

"An undercover mission. We'll track Mutsubushi down under the identity of a couple."

"HELL NAH! I'M OUT!"

Muzan lazily looked up from buttoning his tuxedo.

"This mission is your compensation for failing to kill him last time. Unless, of course, you want me to chop your head off?"

Y/N glared at him furiously from the corner of their hideout.

"What do you want me to do?! Waltz in and expect the humans to buy me a drink?!"

"I can buy you that drink." Muzan adjusted his fedora, smirking at his comrade.

Y/N rolled her eyes, walking past him as she tugged at her F/C kimono. She dusted it for good measure.

"I'd rather be beheaded."

"I can't simply kill you off, Y/N. You are to replace my recently slayed higher-moon.."

"Why not pick another?" Y/N sighed.

Muzan absently readjusted his collar.

"Out of all lower moons, you grew accustomed to my blood the quickest. You're highly skilled, and killing you off now would be a waste."

Y/N felt deeply flattered, but didn't show it. She was familiar with her master and his charming ways. This was probably one of his deceptive compliments.

(However, he seemed to compliment her an awful lot..?)

Finally, Muzan turned around. He nodded to the bustling city outside.

"Shall we be off?"

~~~
Y/N felt very uncomfortable with the presence of humans all around her.

It didn't help that Muzan had wrapped his arm around her shoulders, either.

"Can we not press so close?" Y/N hissed.

Muzan looked amused as he peered down at her.

"We'd be breaking the act."

"But we already look like a couple without the touchy stuff. Besides, your outfit looks good enough."

Muzan cocked his head to one side, a smug smile on his face.

"Same goes to you. The dress suits you well."

Y/N hated the way he was smiling, how he knew that his words were making her a flustered mess. She turned away.

"Don't flatter me."

"It's not flattery to state a fact."

Y/N gnashed her teeth, fighting down the blood on her cheeks.

"You're insufferable."

Unfortunately, her insult didn't quite land on his ears... Muzan's observant red eyes had widened as he gazed at a spot from afar.

Y/N caught that familiar sense of "I-found-something." A reason why Muzan probably brought her was because of her keen sense of hearing. To her relief, he slinked his arm off for her to lean in and listen to the spot he was looking at:

"Why're 'ya looking so paranoid, Takona?"

"Well, you know, ever since Matsubushi returned..."

Y/N perked up at the name "Matsubushi."

"What about Matsubushi?"

"He described them to me in great detail, and now..."

"Don't tell me-"

"I think I spotted those two demons."

Y/N's heart stopped beating momentarily in terror. Muzan immediately caught her discomfort.

"Those two demon slayers. What did they say?" He removed his fedora, looking at her intently. Y/N ignored him and tried to listen to them more.

"We need to tell Matsubushi! I heard he's in that Tamayo hospital."

"Let's kill those two demons first."

Y/N whirled around in panic. Muzan looked back calmly.

"I've got the location but..."

Y/N heard approaching footsteps. Her heart racing, she rapidly tapped Muzan's shoulder and pointed to the approaching demon slayers.

"DO SOMETHING!"

Muzan lazily hummed; then, very casually, he pulled Y/N into a kiss.

The demon's eyes widened, her face flushing a deep scarlet. Her partner masked their lips with his fedora as he slowly tilted his head.

The demon had no other choice. She closed her eyes, playing along with this "disguise."

'How the heck does he kiss so smoothly?!'

She could hear the demon slayers' footsteps coming to an abrupt end, just a few feet away from them.

"You sure those are demons?"

"I-I swear-!"

"Nah. They're just a lovesick couple. Let's search somewhere else."

Y/N was deeply embarrassed at the words "lovesick." However, to her relief, she heard the two walk someplace further from them.

At last, Muzan pulled away. Y/N was still blushing furiously even as he put his fedora back on.

"'A lovesick couple', 'ey?" He thoughtfully smiled.

"Shut up! Y/N scowled, touching her lips. She still couldn't believe what Muzan had done.

"The demon slayer's in Tamayo's hospital. C'mon, let's get back to the task at hand."

"Of course, of course-" Muzan nodded profusely.

"And Muzan..."

"Mm?"

"Th-thanks..." Y/N stammered. Muzan rose a brow in surprise. The demon quickly rephrased herself.

"FOR SAVING US BACK THERE, NOT THE DAMN KISS!"

"Oh, really?" Muzan smirked.

"Don't even think about doing it again."

"I can't promise that.... besides, our mission has only just begun~"