After discovering his true origins, Goku Tsugikuni, under the alias of Goku Urokodaki, learned four of the thirteen forms of the Sun Breathing, and five of the six forms of the Flame Breathing, continued his journey. Suddenly, when Goku walked towards a forest, he heard somwthing. "I hear noises... I think I might have to go check..." he said to himself. As Goku got outside the forest, he found a mansion. "I have to go inside..." he said. "Hey, Rin, if I kill a demon I wasn't assigned to... Am I breaking the rules?" he asked to his crow. "No! Caw! Help if you can! Caw!" noised Rin. "Perfect. Whoever is inside, hold on, I'm coming..." said Goku. As Goku opened the door, he found himself inside a labyrintistic corridor. "I have to find the right way and find the slayer who needs help..." said the boy. And so, he began to run inside the mansion. Finally, he found the sound of the noise again, and as he followed, he finally reached the place. As he entered the room, Goku saw a demon on the verge of it, with drums placed on his shoulder, flanks and belly. Then, inside the room, he saw a young boy, with crimson hair and Hanafuda earrings, who seemed pretty familiar to Goku. "Hello" said Goku. "Who might you be?" asked the boy. "Goku Urokodaki. What's yours?" said Goku. "My name is Kamado Tanjiro" said the boy. "Nice to meet you, Tanjiro-kun. Do you mind if I take on this demon in place of you?" asked Goku. "Well, normally, I'll help you out, but... I broke my legs and ribs, so I need a break" said Tanjiro. "Fine. I'll handle it. Get outside the room" said Goku. "Fine" said Tanjiro, starting to stepping inside the room. "You're not going anywhere!" beamed the demon. As he played the drum on his belly, a clawing attack barely hit Tanjiro, as Goku pushed him away. "Hey! I am your opponent now, not him!" beamed Goku. Tanjiro, sat on the floor, leaning on the wall and clutching his stomach, spoke up. "I fear... I have to stay here... Be careful, Goku-san, this demon can switch gravity..." said Tanjiro. "Fine. Then hold onto something, so you won't fall when it does so..." said Goku. Tanjiro nodded, as he stabbed the wall with his katana, tightening his grip on it. "Now, let's fight, drum demon..." said Goku, with his katana in his right hand, his eyes fixed on the demon's, as the battle is about to begin.
As Tanjiro rests, sitting on the floor, he coughs in pain. (Goku-san seems pretty strong... I wonder if he'll be able to beat this demon...) he thought. "Before we start fighting, tell me, demon: What is your name?" asked Goku. "I'm Kyogai. I once was a Lower Moon, and I have to eat that kid with rare blood, so my lord will make me a Lower Moon again. What about you, slayer?" said Kyogai. "I'm Goku Urokodaki, age nineteen, and Flame Breathing user. I do not know what a Lower Moon is, but as long as I can beat you, it doesn't matter" said Goku. "Tch, parasyte..." muttered Kyogai, as he slapped the drum on his belly. Claws appeared, but Goku dodged. (So... The drum on the belly summons the claws...) understood Goku. As the boy rushed forward to reach Kyogai, the demon played the drum on his left leg, as the gravity shifted. Goku fell down on the right wall. (He can actually switch gravity... This might be harder than I thought). Tanjiro, on the other side of the room, remained gripped to his sword, who kept him in place. (I'm in mid-air... One wrong move, and I'll fall...) he thought, "Tanjiro-kun!" exclaimed Goku, calling the boy. "Do not release the grip on your sword until I'm done with this guy, okay?" he said. "Understood, Goku-san!" replied Tanjiro. As Goku rushed forward once again, Kyogai slapped the drum on his right shoulder, and the gravity shifted to the wall behind. As he fell, Goku managed to grip on the wall, before the door opened and slammed him outside the room. (I managed to grip... I risked this time...) thought Goku. As he threw his body back inside the room, he realized he had to do something. (Right shoulder, wall behind.... Left leg, right wall... So by this logic, right leg is left wall and left shoulder is the ceiling...) realized Goku. "Now I understand!" he exclaimed. "Understand what?" asked Tanjiro. "You'll see soon, Tanjiro-kun!" beamed Goku. "Flame Breathing: First Form -- Unknowing Fire!" exclaimed Goku, rushing towards Kyogai. But even so, Kyogai slammed the drum on his belly, and the clawing attack forced Goku to jump backwards. (I have to use my brain, not only my muscles...) he realized. "Second Form -- Rising Scoarch Sun!" exclaimed Goku once again, rising into Kyogai's direction. "Take this, you unrealized drummer!" said Goku, unleasing his attack into Kyogai's direction. But unfortunately, Kyogai switched gravity again, as he slammed his hand on the right shoulder.
Goku fell after slightly hitting Kyogai. As he regained his position, he placed his foot on the floor, but he didn't trample the paper on the floor. (He... he didn't trample them...) thought Kyogai. "I know this is your work" said Goku. "Earlier, I called you an unrealized drummer... I apologize" he continued, jumping forward. "Your Blood Demon Art is great, Kyogai... and I'm sure your writings are good as well..." said Goku, reaching Kyogai. "But unfortunately, I'm a demon slayer, and you're a demon... And what a demon slayer does..." said Goku. "Is to kill demons like you!". And so, Goku swinged his sword, as Kyogai's head flies away. (He... he said my Blood Demon Art is great... and my writings too...) he thought, while his head was flying. As Kyogai's head reached the floor, Goku sheathed his sword. "I hope you can reach Jannah..." muttered Goku. "Was my Blood Demon Art really great?" asked Kyogai. "It was" replied Goku. Suddenly, Tanjiro stood up. "You're incredible, Goku-san!" he exclaimed. "I have to take the blood..." he then muttered. Tanjiro extracted a little knife and threw it on Kyogai's chest, which lied on the floor. "How did you manage to defeat him?" asked Tanjiro, while extracting the knife from Kyogai's chest, after it took enough blood. "I just complimented him and he stopped attacking me. Maybe he was an emotional demon" replied Goku. Suddenly, a cat appeared. "A cat...?" mumbled Goku. "Yes, He's the cat that'll bring this blood to Yushiro-san" explained Tanjiro. "Yushiro? You visited Tamayo too?" asked Goku, tilting his head. "Yes, I did!" beamed Tanjiro. "Now... Can you help me find Teruko and Kiyoshi?" asked Tanjiro. "Teruko and Kiyoshi? Who are they?" asked Goku. "Two kids that came in this mansion with us" replied Tanjiro. "Fine... I'll help you out" ultimately said Goku. And so, after the cat disappeared from sight, Goku and Tanjiro get outside the room, searching for the two kids.
Chapter 5 - End.