Isekai Mizuki S1 - A World With Demons

Chapter 22 - Muzan Kibutsuji

Within the next 5 days, they went through their week in the resort in peace. Swimming, eating, playing arcade games, all that sorta stuff. On the seventh day, they had gone out to a carnival. Their day there was completely amazing, and the place kept open until midnight, so they decided to spend as much time as they could there.

A mysterious figure on a nearby building was able to see the class. "Heh... this is gonna be a feast for me today. I'm not leaving this shadow just yet... I'll attack the moment the sun vanishes," says the figure.

Sunday, 6:30 PM, Resort Carnival

The sun has completely set, and the moon is full. The figure felt it was the perfect time to strike. When the class was about to disperse to go around the carnival, an explosion occured at the merry-go-round. "Eh?" Kanao questions, perking up. Some spider-like figure was going around, constantly using its gigantic mouth-like arms to devour the humans.

"What the- GO! Get anyone in the carnival out of here!" Isekai commanded as he drew his sword and ran towards the figure. The man didn't have enough time to devour many people. "Wait a minute..." Tanjiro stops to notice the face, recognizing it. "Why now...?!" Zenitsu questions, now in extreme fear at what he's seeing. "This is..." Inosuke says, stopping short. "Muzan Kibutsuji?!" Isekai follows.

"I was hoping there wouldn't be a group of deviants here... oh well, stronger people for me to devour, I suppose..." Muzan muttered, ready to engage in battle. "Get back, citizens! Run now! This man is here to devour you!" he yelled out. The citizens began running to their vehicles, screaming in horror. The Corporation members drew out their swords, and proceeded to battle.

"Blood Magic: Black Blood: Flesh Whips!" Out of Muzan's arms, two whips were formed, and he lashed out at the slayers. "Ugh...! Muzan has clearly been improving!" Isekai mutters. The criminal boss overheard him, and explained. "Improving? No no no. Born as a strong man in itself, I had no reason to train. My body became gradually strong. Others are just simply weak."

"Hinokami Kagura: Solar Heat Haze!"  Tanjiro cried in his heart as he slashed forward.

"What? That was so far away, why would you-" he insulted his adversary, as his throat got nicked. He felt a small feeling of familiarity on that. "...That felt so familiar..." he muttered. He just shrugged it off and dished out more attacks.

"Ugh... he's only using the same attacks, and it's all we have to just dodge! Sword Form: Disorder Slash!"  Isekai used a single slash that cut off one of the whips, which immediately regenerated.

"Root Burst!" Kanao yelled out as roots began to implant themselves into Muzan, who cut them apart within seconds. "HUWEHAHA! Beast Magic: Sword Form: Constant Claw Slashes!" Inosuke followed up, yelling out as he inflicted multiple hits on Muzan.

Muzan reeled back his whip, and said: "Weak." as he brutally swung at Inosuke. He flew at Zenitsu and knocked them both out. "Wind Magic: Sword Form: Purifying Wind Claws!" he said as four slashes were executed, which Muzan dodged. He then threw a punch at him, which immediately knocked out Masachika and sent him flying. "Water Magic: Sword Form: Water- BHAUGH!" Murata tried to cry out as he was interrupted by Muzan's kicks.

Isekai cried out as he lashed out at Muzan with multiple hits from his composite sword, which were avoided. "You're all weak. I'm not even sure why you dared to stop me," Muzan said, heavily disappointed. "Sword Form: Crimson Hanagoromo!"  she cried in her heart as she executed one twisting-and-curving slash.

"Flesh Whips: Sword's Fury!" Muzan yelled out as he slashed around 20-30 times within a second. Murata's and Tanjiro's swords were broken, Isekai's was chipped around the edges, and Kanao's was knocked off her hands.

The battle continued for hours, as the stamina of the slayers began to drop and drop, until only Isekai and Kanae were standing up. "I'm surprised you kept up for, hm, *looks at his watch* eleven hours? Wait... eleven-" he commends them as he realizes his situations and looks to his right. The sun was beginning to rise up, and Muzan was, once again, in tremendous danger.

Isekai figured out the situation, and immediately used his chains on Muzan. "Grrgh! Grrr... Let me go, brat!" Muzan demanded, struggling. "You'll burn in the sun, RIGHT HERE!" Isekai yells, not a hint of relenting in his voice. Tanjiro and Kanao were still awake, while all the other students fell unconscious. Tanjiro realized what was happening and got up to help Isekai hold down Muzan. Kanao crawled towards Isekai, gripped his leg, and implanted roots on the ground that tied around her leg. "LET! ME! GO!" he yelled out, pushing through within each word. "RAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH!" He screamed ferociously as the ground began to form a crater beneath him, and Kanao and Tanjiro couldn't handle the noise, eventually letting go to cover their ears. Isekai didn't care at that point and pulled himself towards Muzan by the chains. When he reached him, he drew his sword and made a wound in Muzan, and thrusted his hand inside. Eventually, the force of the scream was too much for Isekai to handle, and he was blown away.

By the time Muzan was free of Isekai's grip, he already began to burn, but he dove into an alleyway before the sizzling could progress any further. The others woke up by the time he had escaped.

"What happened?" Masachika asks, still dizzy from the massive impact a punch from Muzan dealt him. "...He... got away..." Isekai answers, still trying to catch his breath. "ALL THAT BATTLING FOR NOTHING?!" Inosuke questions, stomping on the ground. "Yes, if you don't count me. I was able to obtain something from Muzan before he escaped. Have I ever told you that once per user, a Blood Magic can be stolen?"

"What do you mean by that? What did you steal?" Kanao asks, trying to stand up. "...I DID get enough time to get something from him," he answers, looking around the place for any injured civilians.

"What exactly did you get from him?" Tanjiro asked, tending to Ozaki's wounds. "The whole thing was a massive gamble," Isekai says, waking up Muichiro and Yushiro, who were somehow still unconscious. "Why?" Tanjiro asks, confused. "I told you, he has multiple Blood Magics. But... I got the good end of things..." Isekai answers, dusting his arms. "Well, answer his question! Which one did you copy?" Zenitsu asks, getting visibly impatient.

"I copied...

I copied Black Blood."

To be continued...