"Exactly," said Muzan. "And that dream will soon become true, as soon as I get my hands on Nezuko," he continued. "Nezuko, you say? Well, you can try, but there is a man who won't allow you to touch that girl or even come close to her..." said Ubuyashiki. "Really? And who's that man?" asked Muzan. "His name is... Goku Tsugikuni," said Ubuyashiki. "You mean the hidden sun? He's no match for me. If he wants to stop me, he can try, but he'll be killed," said Muzan. "You sure? He's got a lot stronger, you know? And he has the same hanafuda earrings of the man who almost killed you five-hundred years ago," said Ubuyashiki. "I know, but only because he's his son, doesn't mean he's a threat to me," said Muzan. "You'll find out soon," said Ubuyashiki. "Are you done talking?" asked Muzan. "Even if you were to kill me, it'll only fuel the Hashiras. But... feel free to do it, I'm not stopping you."
Elsewhere, Rin, Goku's Kasugai crow, started to fly and scream towards Goku. "Emergency summons! Emergency summons! The Ubuyashiki Mansion is under attack!" she screamed. "Let's hurry up, Kyojuro!" said Goku, grabbing his two swords and starting to run towards Ubuyashiki's mansion. "Let's go!" exclaimed Rengoku, following Goku. Just like Goku, all of the Hashira were running towards Ubuyashiki Mansion after their Kasugai Crow informed them. (If the Ubuyashiki Mansion is really under attack... Then it only means one thing... Muzan's here,) thought Goku. (Master, please hold on, I'm coming!) he then hoped. (I can see it... I can see the mansion... I'll make it in time! I know I can!) thought Sanemi. But then, all of a sudden, the Ubuyashiki Mansion went up in flames. All Hashiras' eyes filled with horror, seeing the flames in the distance. Goku's only eye did not only fill with horror, but also with hatred towards Muzan. "That man... I hate him..." said Goku, starting to shake. "Goku-kun, calm down now..." muttered Rengoku, trying to calm his friend down. "I'LL FUCKING KILL HIM!" screamed Goku, spriting forward. "Oh no... He's driven by hatred..." muttered Rengoku. Muzan, who got involved in the explosion, fell on the ground, gravely injured. However, for him, regenerating was not a problem. Quickly, he regenerated his legs and got on his feet, slowly regererating his face. (Ubuyashiki... He blew up himself alongside his wife and his two kids... I had the wrong idea about him...) thought the Demon King, as his body fully regenerated. But suddenly, a bunch of flesh seeds surrounded Muzan, and before the Demon King could react, spikes digged in his body, immobilizing him and injecting a strange sustance inside his body. (I've been immobilized! Whose Blood Demon Art is this...? Well, no matter. It's not like there are many. I'll just absorb them!) he thought. But suddenly, someone stabbed him in the chest. Muzan lowered his head and saw Tamayo had stabbed him with her own aem. "Tamayo! What are you doing here?" he asked. "This thorn Blood Demon Art belongs to the man you turned into a demon in Asukasa!" said Tamayo. (So, she approached me by using Blood Demon Art: Eyebling, huh? What is she after? What did she do?) wondered the Demon King. "So, you absorbed it, huh? My fist, I mean. What do you think it contained?" asked Tamayo. "I'll tell you: A drug that turns demon back into humans! Is it starting to make effect?" she asked. Muzan gritted his eyes and stabbed his finger on Tamayo's forehead. "You really don't know when to give up, Tamayo!" he shouted. "Fine! I'm gonna die here with you, if I have to!" said Tamayo. "Himejima-san, do it now!" she then shouted. From afar, Gyomei arrived, swinging his spiked flail in the air. But then, from the other side, someone else arrived: Goku.
"MUZAN!" shouted the Sun Hashira. (He's here too...!) realized Muzan. "Namu Amida Butsu!" exclaimed Gyomei. Without hesitating, Gyomei hit Muzan, decapitating him. "Hands off my mother, you monster!" shouted Goku, attacking Muzan at the same time as Gyomei with his two swords. "Good job, Tsugikuni!" said Gyomei. (Goku... Why are you here? You're right where Muzan wanted you!) thought Tamayo. (Since the first time I met the master, I've always admired him. Only Gyomei knew about his plan. Honestly, I didn't know about it. I'm here just because I sprinted forward. Master, I swear, we'll defeat Muzan, even for you...) thought Goku, wiping his mouth. But then, when Goku started to think that was over, Muzan regenerated his head. (That's right! Okasan had told me... even if you behead Muzan, he won't die!) remembered the boy. "Tsugikuni, the only thing that can truly kill Muzan is sunlight! We have to keep him restrained until sun rises!" said Gyomei. "You said this like it's easy!" said Goku. "Black Blood, Brambles!" exclaimed Muzan. All of a sudden, bloody spikes attacked Goku and Gyomei. "Stone Breathing: Third Form -- Stone Skin!" exclaimed the Stone Hashira, countering the spikes. "Sun Breathing: Seventh Form -- Sunflower Thrust!" exclaimed Goku, protecting himself. Finally, Sanemi arrived and leapt on a roof. "Are you the one?" he asked, talking to Muzan. "What the hell did you do to the Master?!" he asked, furious, extracting his sword. Then, also Shinobu and Muichiro arrived. (Goku-kun... What is he doing there?) wondered Shinobu. Then, the last Hashiras arrived. (We're all here... the master's strategy was brilliant!) thought Gyomei. "IT'S MUZAAAN!" screamed Goku. "He's Muzan Kibutsuji! Even if you behead him, he won't die! He's a first-class motherfucker, in short!" he shouted, pointing his sword in his left hand to the Demon King. "Everyone, on him!" commanded Gyomei. In a blink of an eye, every Hashira dashed towards Muzan with their Breathing Styles. But then, the Demon King smiled.
Under the Hashiras' feet, the floor disappeared, and a trapdoor-like space opened. Goku felt the ground disappear from under his feet. Because actually, that's what literally happened. (This... This is the Infinity Castle!) realized the boy. Even the others -- Genya, Inosuke, Zenitsu, Kanao and everyone -- fell inside the Infinity Castle. "Kyojuro! I'm with Giyuu, watch your back!" shouted Goku to Rengoku. "I will, good luck!" shouted Rengoku, disappearing from sight as he fell. "Goku!" shouted Tomioka from down. "Yes, I know!" said Goku, landing on the first place possible. The boy raised his head and saw Muzan. "Did you really think you had cornered me? I'll exterminate you all, I won't spare anyone!" he laughed, maniacally. Then, Goku noticed Tamayo was still being stabbed in the forehead by Muzan. "Okasan, hold on! Your son is coming for you!" he shouted. But then, once again, the floor disappeared under Goku's feet. "You're the one who's going to Hell, Muzan!" screamed the one-eyed boy, while falling. "Do it, then! Let's see you try... Goku Tsugikuni!" exclaimed Muzan. Then, he disappeared from Goku's sight. "I'll absolutely defeat you, Muzan Kibutsuji!" shouted Goku.
Chapter 50 - End.