Demonslayer oneshots 🪻

🫐 I Think I Remember Loving You | Y/N x Sanemi 😡

(Part two of Y/N x Sanemi. Warning, violence, gore, and a long ahh fight scene ahead)

"Sanemi." A deep voice stated, jolting Sanemi awake. He gasped, his chest heaving up and down, as if he was awoken from a dream. 

He turned around, and there he was. Muzan-sama, his master. No, not his true master. He knew that now. Muzan sneered at him, an expression of disgust on his face seeing his Upper moon. "You disappoint me, Sanemi. I graciously allowed you to replace the original Upper moon 2's position, and the first thing you do is betray me. Because you were overcome by silly little voices." he snarled, his fists clenching tight. 

Sanemi tensed, a wave of fear rolling over him, almost enough for him to bow down and beg for Muzan for his forgiveness. 

"Sanemi." a softer voice whispered, so quiet Sanemi almost missed it. The girl, the one who was responsible for the voices, the one who led him here, his lover... Sanemi gritted his teeth, balling his hands into fists. He wouldn't be taken for a fool now. Not when he knew, not when he remembered. If he had to fight to escape his control, so be it. 

A chuckle rang out in the air, Muzan's voice creating goosebumps along Sanemi's skin. "Are you going to attempt to attack me, Sanemi?" he asked, a sly grin on his face. Sanemi froze. He was still somewhat under his control, and so Muzan could still read his mind. 

"How pathetic and idiotic could you be to think you can kill the demon king?" he snarled, his eyes wide with rage. His grin was gone, and irk marks could be seen throughout his face. Sanemi wouldn't dare think of backing down, even with that look. His stomach churned with anticipation, as he took a step closer to his former master, preparing himself. He saw Muzan lift a hand closer to his face, before seeing large claws instantly sprout from his fingers. There was no going back now. 

Within a blink of an eye, he had disappeared, and Sanemi only had milliseconds to dodge. He flew to the trees, clinging to the tip of the trees that shrouded the graveyard from prying eyes. Not even a moment later, Muzan had shredded the ground Sanemi once stood at, his claws the result of the damage. 

He released a tense breath, and launched himself toward Muzan. "Blood Demon Art; Tornado Spiral!" he yelled, running toward Muzan at such high speeds milliseconds could be like minutes for him. As such, a road of destruction was left in his wake, including shredded trees and destroyed soil. He aimed a hand with claws himself at Muzan's head, while kicking his torso. Muzan struggled to block all of his attacks, with Sanemi moving at a rapid, blurring pace. He clawed everywhere and anywhere, not stopping for even a breath. 

Sanemi wanted justice. He wanted revenge. He wanted it all. Muzan let out an angry yell, sending a kick toward Sanemi. 

He ducked under his leg, but failed to see his trick. Immediately, tentacles shot out from his body, and surrounded Sanemi. He gasped - and the tentacles immediately pierced through his body. He let out an agonizing scream as they crushed and destroyed any and every organ, bone, and artery found in Sanemi's body. A ragged breath was all he heard, until the tentacles pierced through his body again, dripping with his body. All he could hear was his blood-curdling screams and shouts, falling limp against the tentacles. 

Then, he ripped out a tentacle from his body, and pulled it with all his strength. He threw Muzan toward the trees, sending him flying through the forest. The force managed to rip off all of the treetops within a few miles of their battle. 

Sanemi didn't even wait for regeneration, he forced himself to chase after his master, destroying any trees blocking his path. He felt his organs and insides grow back painstakingly, as he jumped from treetop to treetop. 

Long, vicious tentacles shot from the treetops, much longer this time, intended just for him. However, they were coated both with Sanemi and Muzan's blood. That alone gave Sanemi the glimmer of hope he needed to push forward. 

"Blood Demon Art; Breath of the Gods!" Sanemi graciously dodged and flew from the tentacles, leaving fast whooshes behind. The tentacles began to bow to his speed, flying in a circular motion, like a hurricane. In one strike, they were all chopped off. He continued forward, ripping and dodging all of the sharp tentacles. Finally, he spotted Muzan's silhouette again. "You fucking bastard, how could you?!" he shouted, charging at him once more. And once more, tentacles reached toward the sky. Toward Sanemi. 

Suddenly, Muzan felt blinded. Something was obscuring his vision. "What the hell?" he thought before a flash of a person invaded his eyes. A girl with a blueish hue, standing in front of him. She lifted her gaze toward him, and he felt hatred, anger, sorrow, all of it. Emotions flooded through his mind. "Go to hell." was her words before she disappeared, and appeared in another place. More people, no, spirits, appeared with a similar hue. He took a step back, as hallucinations began to appear. All he could hear was a chilling soft voice and see multiple people. Overlapping voices flooded his ears, overwhelming him. His vision and ears begin to spill blood, as he lost two of his senses. 

"Get away, you ghost bitch!" Muzan yelled, clawing his ears and eyes out. Suddenly, he felt himself get slashed and diced to ribbons. "The only bitch here, is you." a low voice stated, as Muzan felt himself trampled to the ground. Sanemi began to shred his master to pieces, not stopping until he couldn't find a sliver of flesh. Once he couldn't see a molecule of his master, he let himself take a deep breath. Was he really... gone? 

Without warning, Sanemi felt his head loosen, with blood spurting out. He gasped and quickly grabbed the whip-like tentacle, piercing through it with his nails. "Fuck!" he thought, as panic seized him. His head was almost completely separated, practically hanging by a thread or two.

 What a fool he was, thinking it was all over that quick. "You really thought I would go down that easily?!" he heard a booming voice cackle, with chilling laughter following. More tentacles burst out, and Sanemi could barely dodge them all. 

While doing so, he felt his insides burning. Everywhere in his body, felt inflamed. He gasped, crumpling to his knees. He impaled his claws to the nearest tree, to hold himself upright. His hands clutched it tightly, holding high above his head before throwing it towards Muzan, to buy some time. 

Meanwhile, he glanced at his arms, which were turning into clumps of flesh. Wounds burst through his body, with more raw pieces of flesh appearing on his body, bringing back more anguish. Sanemi screamed, falling to the ground. "What... what is happening?" 

Sanemi heard a loud chuckle, and he could barely glance up at Muzan without coughing large amounts of blood "It's rather simple; My tentacles are infused with my blood. However, you are already a demon, and these aren't the cells that will make you stronger. Rather, your cells will decay, and you will die." His thoughts announced, with a lower voice. "You, YOU BASTARD!" Sanemi yelled, before hacking up more blood, leaving stains on the ground. He could see his former master sneer at him, and it only brought more fury. 

He couldn't die like this, not when he was so close. Tears ran down his face as more tentacles swarmed him. Once again, puncturing his body, leaving more excruciating wounds. His voice was becoming hoarse from all the screaming, as he struggled to rip out the tentacles. 

"Am I really... going to die this way?" were the words flashing through his mind, as he continued to uselessly defend himself. He gritted his teeth. No, he needed to avenge them. His friends, his family, his lover, everyone. 

Suddenly, a fist full of claws and trickles of blood appeared at mere inches near Sanemi's face. 

He shut his eyes... and he was somewhere else now. Just a silent gray space... and something clutching him tightly. He looked down, and saw Genya and Y/N. "

You still aren't there yet. You haven't remembered it all," the two said in synchronization, with smiles full of melancholy. Their voices were like a gentle breeze, and Sanemi almost burst into tears right there. He felt his eyes close once more, preparing himself for what would await him when he awoke.

(So, this is my first time writing a battle scene, and I tried to make it as accurate as possible. Sorry for the long wait, I tried making it as good as possible. Although, it turned out really long... like, 1,500ish words. I'm gonna need to make a part 3 I'm sorry 😭 Have a good day!)