demon Slayer oneshots (Mainly Muitan)

hazbin hotel au part one?

Before I start, I want to say that I know you guys are waiting for the MHA AU, but when it comes to that, I have extreme writer's block. So please give me some time. I will let you know when I come up with ideas for that. But on to what you guys actually came here for! Oh, and real quick, if you haven’t seen my last chapter telling everyone's roles, then you’re in the wrong place. Go back there now. Let’s start.

Please enjoy.

---

Once upon a time, there was a glowing city protected by golden gates known as Heaven. It was ruled by beings of pure light—angels who worshipped good and shielded all from evil. Yoriichi was one of these angels, a dreamer with fantastical ideas for all of creation. But he was seen as a troublemaker by the elders of Heaven. They felt that his way of thinking was dangerous to the order of their world. So he watched as the angels began to expand the universe in their ways. From the dust of Earth, they created Kokushibo and Uta, equals as the first of mankind. But despite this, Kokushibo demanded control, and Uta refused to submit to his will. She fled the garden, drawn in by her fierce independence.

Yoriichi found her, and the two rebellious dreamers fell deeply in love. Together, they wished to share the magic of free will with humanity, offering the fruits of knowledge to Kokushibo's new bride, Eve, who gladly accepted.

But this gift came with a curse. With this single act of disobedience, evil finally found its way to Earth. A new realm of darkness and sin emerged, and the order Heaven worked to maintain was shattered. As punishment for their reckless act, Heaven cast Yoriichi and his love into the dark pit he had created, never allowing him to see the good that came from humanity—only the cruel and the wicked. Ashamed, Yoriichi lost his will to dream. But Uta thrived, empowering demon-kind with her voice and her songs. As the numbers of Hell grew, so did its power.

Threatened by this, Heaven made a truly heartless decision: every year, they would send down an army—an extermination—to ensure Hell and its sinners could never rise against them. But Uta's hope remained, and the dream was passed down to their precious son, the prince of Hell.

I slowly closed the book I was reading, using my powers to make the key in my hand float.

"Don't worry, Mom. I'll make you proud," I said, closing my hand on the key. I looked out the window of my room, staring at the flaming city of Hell. I heard the door open behind me, but I ignored it.

"Tanjirou," I heard someone say behind me, which made me jump and quickly turn around. "Ah, oh, did you hear what I said?" I asked panickedly as the figure stepped into the light.

"Yes, I was standing at the door," my boyfriend said with his hand on his hip, eyeing me with a smirk. "I'm sorry. I get a little nervous after an extermination, and this story relieves me," I said, looking down at the book in my hand.

My boyfriend, Muichiro, laughed a little bit before starting to walk over. "I understand. Don't worry. I love that you're so dramatic. You're fine," he said, sitting down next to me.

"I'm fine. I was just remembering my family, and I still don't—" I started saying before I stopped and paused quickly. Muichiro asked, "Do you know anything about your mother?"

I looked down and closed my eyes before shaking my head slowly. "How much time has passed?" he asked, concerned.

"It hasn't been so much, just a few years, but she must be doing something very important. I'm sure because my mother loved this kingdom very much, and I love it too," I said, standing up and putting my hands over my chest.

Muichiro walked closer to me and grabbed my hands. "Hey, I'll always be by your side," he said, smiling.

"I just hope what I'm trying to do will work here," I said as we sat back down. Muichiro put his forehead on mine. "It will work. I have a lot of faith in you."

He quickly jumped up and stood in front of me. "Very well, let's go to Tsuki. She has something to show us," he said as he turned around and walked to the door. Behind me, I could hear that familiar bell. I turned around and looked at the only light thing in this city—a building made by the angels of Heaven for the extermination.

I looked at it for a few more seconds, then got up and followed Muichiro.

---

(Time skip brought to you by my crippling writer's block when it comes to the MHA universe)

---

"Greetings, wayward sinners. Do you like blood, violence, and sexual deprivation? Of course, you do. That’s why you’re in Hell. But what would you say if I told you that there's a place to stay that has none of that? Welcome to the Hazbin Hotel, a path to redemption. Founded just two days ago by Yoriichi’s delusional son, Kamado Tanjirou! Come put your destiny in his inexperienced hands while he tries to solve his daddy issues! Here, we offer you fun services like our almost-trained staff, 24-hour pest control, personalized rooms, and check out this luxury lounge. Enjoy a fascinating conversation with our single resident! Wow! All this and more at the Hazbin Hotel. Your last desperate attempt at salvation starts here!"

Finally, the TV turned off, and the ad was over. Muichiro and I just stared at the TV in shock. "So, boys, what do you think?" Tsuki asked with the same smile she always had.

"I'm sorry, what the heck did I just see?" Muichiro yelled. "Yes, I have a question. First of all, thank you very much for doing this, really. It was... amazing! But maybe the tone is a little dark. We want people to want to come here, but this does seem a bit...," I said before I stopped, seeing that Tsuki was still smiling. I could tell I was making her upset.

"Shady, that's the word you're looking for," Muichiro said, finishing my sentence. "How unexpected. I would say it was hilarious," Tsuki said, making Muichiro more angry. "But you didn't explain anything about how we try to protect the demons from extermination, which is the entire point of the commercial!" Muichiro yelled at her.

"Muichiro is right, Tsuki. The commercial was for sinners so they knew that we want to help them," I said, trying to ease the tension.

"Well, dear, I have not been active in Hell for a long time, and everyone remembers me for my radio program, which is the appropriate medium to express oneself in the best way. But you insist on this—a strident advertisement in a box. So, I wanted to have fun," Tsuki said, slapping her fan on her hand.

"You really wanted to have fun? Well, that garbage doesn't represent us! When you showed up here a week ago, you said you would help run this hotel. You just wanted to have fun?! No one is going to want to come to a place that a powerful being like you thinks is a waste of time," Muichiro yelled, standing up on the couch before sitting down on the armrest when a hand shot up from the other couch.

"If your intention is to film a commercial, I suggest you make better use of the talented celebrity who is sitting right here in front of you," he said, pointing at himself. Muichiro’s face looked even more annoyed than before.

"Giyuu, you're a porn satr," Muichiro said. "A famous porn star! All you have to do is film a commercial of me, and you will have the most interested sinners tearing down these walls to get in here," Giyuu said, laying down on the couch.

"We are not going to shoot a porn for our commercial," Muichiro said. I could tell he was on his last straw.

"Why? Sex sell, it's like that. I swear if you film me going at it with Miss Fancy Talk over here, you would be surrounded by demons willing to stay at this tacky hotel," Giyuu said as Tsuki used her magic to appear at the side of the couch by his feet.

"Hah, never going to happen," Tsuki said, eyeing him. "Giyuu, I really appreciate that you want to use your... special abilities to attract people to the hotel, but I don't want to have to exploit you that way," I said, trying not to sound disgusted.

"Oh, please, my guy. This body was made to be exploited. I have the arms, I have the stamina, I have the legs, I have the lung capacity, I have the legs! The arches, the girly body, the..." Giyuu continued saying stuff, but I wasn't paying attention as my phone started to ring. I picked it up and quickly gave an excuse, then left to go to another room. I could hear Giyuu say, "I can keep going all night," behind me as I walked away.