The Demon King Became An Otaku?

{A/N:  Give me a ton of comments if you want those juicy smut chapters in the future.}

One could see a boy in his early twenties walking in the park towards his home. He had long black hair that extended to his shoulders and blood-red eyes, which were lenses.

His eyes were originally brown, but he wore red lenses since they looked cool. He was also wearing very expensive clothes and carrying a polythene bag with a pack of ramen in it, with a smile on his face.

Seeing him for the first time, one might think he was an angel sent from heaven, but the reality is he is the reincarnation of the Demon King, Muzan.

After being killed by the Hashiras, he reincarnated in the modern era and found out that his entire life story, from birth to death, was part of an anime called "Demon Slayer."

His reaction was like, "What the fuck!" He was so mad he wanted to kill everyone who had watched Demon Slayer.

Unfortunately for him, the world had already united many decades ago, and almost everyone could use the "American Breathing: AK-47" to kill Muzan, who is now just a normal human.

Muzan's POV

I can finally watch that thing I thought as I got closer and closer to my home. Though it was as big as a building, who cares? Since I was born into a rich family in this life as well, I might as well live my life to the fullest.

It's not like I can turn back into a demon once again. From what I managed to find out, the blue spider lily is already extinct, and I'm not the doctor who made me a demon either. I don't know anything about such things.

It's not like I became a saint as soon as I reincarnated. At first, I was still acting like the demon king and even killed three people with a freaking pencil in a bar but got arrested.

This world is too dangerous for me to act like in my past life. People here have guns, and they call it "American Breathing" as a joke. Like seriously? It hurts the feelings of a poor and innocent demon king like me.

And the most terrifying thing I found was that there is an anime called "Demon Slayer," and I was a character in it—the ultimate demon, Muzan Kibutsuji.

But many people also call me Michael Jackson. I don't get it; we have nothing in common. I am smart, handsome, and cool. Like really? If you want to compare me, compare me to gods or something.

But anyways, what can I even do now? Humans here have "American Breathing," armies of millions of people, and after seeing all this and reading everything about Demon Slayer—every theory, everything related to Demon Slayer—I also realized I was really stupid in my past life.

I should have just sent all of my Upper Moons to kill that Tanjiro boy and be done with all this shit. I could also have tried to produce demons by the normal method.

"Like, by putting my stick in the hole method instead of just trying to turn humans into demons. That method was really tiring and not that good."

"Finally reached it," I thought as I saw my home, a building with more than ten floors. Though only I live here since my parents and I don't really like each other.

They think I'm crazy, and maybe also because I changed my name from Gonpachiro to Muzan. Because of that, they just give me a monthly allowance and nothing apart from it.

And you can say I'm kind of greedy to hire maids since they might destroy my precious collection. What is the collection I'm talking about? The action figures of my waifus, of course.

After I reincarnated in this world and watched this thing called anime, I slowly but surely became addicted to it and also made many females from anime my waifus.

Like Shinobu, Mitsuri, Hinata, Hanabi, and many more. The list is too big for me to name them all at once.

Soon, I entered my home and went straight to my room, which was filled with many action figures, waifu pillows, and posters of naked waifus. The typical otaku stuff.

Then I opened my PC, launched Chrome, and started typing something: "Muzan and Demon Slayer females H-E-N-T-A-I." I typed this while making a demonic-looking smile on my face intentionally.

I have waited long enough to have hentai dedicated to the great Muzan, aka myself, and can't wait to fap-fap to it.

"Mitsuri-chan," I thought, seeing the thumbnail of the hentai video where Mitsuri was just in a towel in front of the great Muzan.

But suddenly, my PC started to heat up very quickly. I mean, like really quickly. And suddenly, "Kaboom!" It exploded right in my face just as I was about to take my pants off to fap-fap.

"Will I die again?" I thought as I fell to the ground due to the explosion, closing my eyes. My entire body was burning right now. I didn't know how that was even possible.

.....

"What is this?" I thought as everything I could see was void, or what humans call it. I didn't know if I died or if I was in a coma, but I knew I messed up.

"Muzan-sama... Muzan-sama." Suddenly, I heard a very sweet voice. It was sweeter than any woman I had met so far. As I tried to see where the voice came from, the void started to open along with my eyes.

Third Person POV

"Muzan-sama! You're finally awake. Physician-sama is here with the medicine he made to cure you," a beautiful woman with long black hair and blue eyes said to a very pale-looking man who had just opened his eyes.

The man was obviously shocked by his surroundings and the maid in front of him. Even though Muzan didn't remember much from his time as a human, he could never forget this room where he spent all of his teenage years.

"P-Please leave the room for a moment," Muzan said with a stuttering tone. The maid obeyed his command, as Muzan was feared by almost everyone—not only because he was the son of a general, but the son of a very wealthy general at that.

"HAHAAHAHAHAHAHAHAHAHHAAHAHAHAHAHAHAHAHAHAHAHAHAHHAHAHAHA,"

Muzan started to laugh like a madman as soon as the maid left the room, but in a very low pitch to ensure no one could hear him.

"This is my chance! I will become immune to the sun this time," Muzan declared in his mind.

According to many fellow otakus in his past life who had watched Demon Slayer, if Muzan hadn't killed the doctor who made him a demon, he would have become immune to the sun.

Even though Muzan had lived 21 years in the modern world, if fate offered him the chance to become the king of demons again, he would gladly accept it. The twist now is that the Demon King wants to build a harem this time.