My Boss Is A 1000Years Old Demon Lord|| Muzan X Mitsuki|| Kimetsu No Yaiba
  • Reads 63,829
  • Votes 2,837
  • Parts 100
  • Time 9h 23m
  • Reads 63,829
  • Votes 2,837
  • Parts 100
  • Time 9h 23m
Complete, First published Mar 26, 2020
Mature
***
So this is basically an alternate story about Muzan and the heroine I made up, Mitsuki.

I'm so sorry for any mistakes, cause I suck at writing.
***

Both of them used to know each other when they're young. A 15 years old Muzan fallen in love with a 514 years old demon queen, Kazuki Mitsuki. However his sickness and her demon identity, they couldn't last long, and that's when Kibutsuji Muzan fell into despair, knowing that the love of his life left him. 

As years past, that despair turns into rage and hatred, and slowly, the caring lord turns into a vindictive and malevolent demon progenitor. 

Years, decades, centuries....

21st century

Muzan and his family took a business trip to Hollywood because of an agreement of partnership. Two companies collided into one. 

Muzan, now known as Tsukihiko, is the Chairman of the company. However, the other company has a celebrity star, Miki, last known as Kazuki Mitsuki. Muzan never knows she's the girl he hates because of her name and appearance has changed, and the same goes for Mitsuki. 

Kazuki Mitsuki, loathes men. She thinks them as pigs. So, where's the fun of not showing them who's boss? She started to have her playerish ways.

Two, totally personality changed demon, came from different worlds... 

However, the only thing that similar is the hatred they had with one another.

If you say impossible for them to fell in love, think again
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Marrying the last boss was not in my life plan. 𝑰𝒇 𝒚𝒐𝒖 𝒓𝒆𝒇𝒖𝒔𝒆 𝒕𝒐 𝒎𝒂𝒓𝒓𝒚 𝒎𝒆 𝑰 𝑾𝑰𝑳𝑳 𝒓𝒆𝒅𝒖𝒄𝒆 𝒚𝒐𝒖𝒓 𝒕𝒐𝒘𝒏 𝒕𝒐 𝒂𝒔𝒉𝒆𝒔. At the threat I could only stare at the demon lord in disbelief. 𝑫𝒊𝒅 𝒉𝒆 𝒈𝒐 𝒄𝒓𝒂𝒛𝒚 𝒐𝒓 𝒊𝒔 𝒉𝒆 𝒐𝒖𝒕 𝒐𝒇 𝒉𝒊𝒔 𝒎𝒊𝒏𝒅. 𝑰𝒕'𝒔 𝒑𝒓𝒐𝒃𝒂𝒃𝒍𝒚 𝒃𝒐𝒕𝒉. Miyuki Amaterasu, I, a devoted maiden who has pledged my celibacy to my mother, the goddess Amaterasu, found myself in a predicament. It turns out the demon lord, infamous for his crankiness and grumpiness, demands that I become his wife. I mean, seriously, can't he find a more suitable bride? What's your answer?" he asked, looking far too amused by the whole situation. "𝑫𝒖𝒅𝒆, 𝑰𝒕 𝒉𝒂𝒔𝒏'𝒕 𝒆𝒗𝒆𝒏 𝒃𝒆𝒆𝒏 𝒂 𝑴𝑶𝑵𝑻𝑯 𝒔𝒊𝒏𝒄𝒆 𝒚𝒐𝒖𝒓 𝒍𝒂𝒔𝒕 𝒘𝒊𝒇𝒆 𝒅𝒊𝒆𝒅?!" I found myself under immense pressure from Muzan's rather insistent relatives. They convinced me-yes, me, to infiltrate the demon lord's household disguised as a spy. My mission? To uncover his weaknesses and secrets while tiptoeing around like a clumsy ninja. All this while risking my own safety in the process. Why don't you just ask me to perform a dramatic exit like his previous wives? Will I succeed in my mission and survive the dangerous game of deception, or will I succumb to the allure of the demon lord's unexpected charms? ⋆。°✩ Spoilers ⋆。°✩ I succumbed. "I love you," the man declared, stabbing my sister casually. "No," I snapped, and he glared at me like I was the one missing the point. "No? What do you mean, 'no'?! I'm the one who loves you!" he protested. I rubbed my temples, trying to process this absurd situation I was in.
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♧ (Y/N) is a nice gentle demon, but can be quite sensitive at times. (Y/N) became a demon by almost being killed from Muzan Kibitsuji when he was killing your family on a cold windy night. His blood managed to infect her wounds to make her turn into a demon. He didn't notice because he left. Though she actually didn't know, she was a special type of demon. (Y/N) ran away from her house then found a small abandoned cottage wooden house that was still in very good condition, so she now lives there. She goes outside on nights in front of her new house to admire the moon's beautiful moonlight from the balcony she has. "I wonder why someone would abandon a beautiful wooden cottage with such scenery like this?" Her eyes sparkled as the moon shined in her eyes. ♧ Slight Various Kny x Reader! ◇ (Y/N)= Your name ◇ (L/N)= Last name ◇ Maybe grammatical errors. I keep switching pov, using ",but" "well" "Then" and it's just a mess ◇ I'm typing this on my school's computer then copying and pasting into my phone so the lines might not be good. ◇ I'm going to edit a lot of stuff. . . ◇ I'm a newbie writer so please don't be mean to me if it's bad because it probably is. ◇ I try to get at least 1000+ words for each chapter. ◇ I'm not the type of person to cuss very likely, so I use something like "chicken nuggets" for the cussing. Sorry if it annoys you. ♤ The pictures and gifs don't belong to me. They belong to the owners of them. Unless I say it is. ♤ The characters belong to Koyoharu Gotōge the writer and illustrator of Demon slayer. ☆ of course there will be gore, fighting, maybe even abuse, ect. ☆ This does contains spoilers for the anime episodes and manga spoilers. ☆ A notice and reminder this is a "peach pink theme female demon", so the color of the kimono and overall theme color for the female demon is peach pink theme. ♡ Now we will begin this Demon slayer x Demon F! Reader
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