Warning: LAW OF PHYSICS has left the story.

(Loud Tremor)

Saitama lifted a terrain ranging 500 meters, destroyed a chunk of debris and rubbles that are flying upward almost reaching stratosphere.

Saitama then leaps aggressively leaving a crater and going to play around with Akaza in mid air.

Akaza and Saitama moves at blinding speed not even Rengoku and Tanjiro can see with their eyes.

They used the flying debris as their stepping stone.

Akaza becomes bloodlusted and going full power against the Power Pillar.

(Swoosh)

"GRAHHHH!! DIE DIE DIE!!!" The bloodlusted Akaza throws a barrage of punches against the hero while also dashing insanely at the flying debris.

Saitama is seen deflecting Akaza's attacks effortlessly, but the hero remains serious.

(Whoosh)

(Bam)

"Oi, tell me where is your master, basket ball boy!" Says the serious Saitama while playing around with the bloodlusted Akaza.

"SHUT THE F*CK UP! I'M GONNA KILL YOU AND TEAR YOU TO SHREDS!" Answers the enraged Akaza as his mind is full of violence.

Saitama didn't attack against Akaza, the hero was all defensive while Akaza being the offensive.

The hero doesn't want to end the fight yet, still he wants to spill some information from the bloodlusted Akaza.

Meanwhile..

"I can't see them....they are very fast, as if I am just watching them being invinsible! But if mister Saitama doesn't have a sword, how can he beat that upper moon demon knowing they can't be killed without nichirin....?" Says the overthinking Tanjiro, he tried to stand up but he still can't.

Tanjiro has an idea, he wants to give his sword to Saitama.

But...

"Huh? Where's my sword--" Tanjiro looks for his sword when he noticed his scabbard is empty.

Zenitsu in almost collapsing state says "your damn sword was already wielded to mister Saitama before clashing with that demon...just look at him in the flying debris in the sky"

"Huh?" Tanjiro scratches his head and tries to look at Saitama who was at the sky stepping at the giant flying debris.

Tanjiro smiles awkwardly and his head is overheating from overthinking how did Saitama took his sword without his awareness "but but but how...my sword was right behind me...?" In confused tone.

Saitama is seen carrying Tanjiro's sword, if you want to know how, it's when he grabbed the sword without Tanjiro's permission.

The hero was all serious and not joking around

(Swoosh)

"Power Breathing First Form: Normal Slash" Saitama swings his sword and slash Akaza's stomach, cutting the demon in half.

(Slash)

(Thud)

"Burrggg eughh..." Akaza vomits blood from his mouth while his eyes goes bleeding, the damage is intense that his regeneration becomes slow.

Saitama asked the blodlusted Akaza in serious tone "if you don't tell me where's your master, I'll slash your arms next"

Akaza wasn't listening but more like he is overthinking: "this guy has very low fighting spirit, I am not interested in fighting him but why does my heart doesn't want to accept his existence!!!?"

Akaza gets more angry, his body is forced as he regenerated and recovers his entire body.

Akaza grit his teeth and stomps his foot while in the flying debris as he shouted "Destructive Death: Compass Needle!"

Akaza develop a glowing snowflake below his feet before he charges back at the hero with his bloodlusted look

"DIE PILLAR!" Akaza lunges his left hand aiming at the hero's face.

(Loud explosion)

(Bam)

Saitama takes the full blow of Akaza's attack and remains unscathed.

(Blood gushing)

The left hand of Akaza was fatally wounded instead, the demon doesn't understand why the hero won't be getting damaged "You are just a human! How dare you oppose me as the upper rank 3!!"

The hero paused as he was greatly annoyed of Akaza being so loud and irritating so the hero spoke in honest tone "it's because you are weaker than me, that's it, accept the truth."

The upper moon Akaza paused for a moment as he realized that the hero was not lying, he has a look of shock, and his body trembling a lot.

"W-what!??" Akaza's vein bulging around his entire body as he was taunted by Saitama's comment.

Akaza can't contain his anger anymore, his anger meter is about to erupt, Akaza is becoming crazy and enraged.

"YOU BALDY! HOW DARE YOU INSULT ME LIKE THAT!" Akaza throws barrage of punches against the hero.

The hero takes all attack and was like "...ok?" remaining unscathed.

Akaza's eyes going bloodshotted as he chanted "Technique Development, Destructive Death: Annihilation Type!"

Akaza lunges his fist towards Saitama's face and the hero was sent flying at the skies between debris to debris.

All debris in his path turn into ashes after Akaza's overwhelming power but the hero remains unscathed.

(Bam)

(Loud Explosion)

(Thud)

Saitama goes back dashing towards the bloodlusted Akaza, but Tanjiro's sword broke instead "oops, I overexert myself that my grip destroyed Tanjiro's sword...."

Saitama in his mind while praying: "I hope that old man won't kill Tanjiro.."

The flying debris is now falling below slowly in the skies, Akaza and Saitama is seen struggling to stand their ground

But their intense battle continues, the hero is seen super bored fighting Akaza and can't gain any helpful information about Muzan's whereabouts.

Rengoku noticed Saitama's sword broke, so the flame pillar says "Mister Saitama! Use my sword and finish him off!!" In lively and supporting tone.

Rengoku takes a deep breath and says "Total Concentration Technique..."

(Flame sounds from his mouth)

Rengoku puts up a stance and throws his sword upward in the skies, aiming for Saitama.

Saitama's eyes lit up as he grabbed the flying sword that was aimed at him and says "you don't mind if I accidentally chip this right?"

Rengoku grins while responding "I don't mind as long as you defeat that demon!" In spirited tone.

Inosuke and Tanjiro was thrilled as they shouted "You can do it mister Saitama!!"

Saitama smiles at their support, the hero can't contain himself smiling at them and says "thanks, I'll just teach him a lesson not to mess with humans"

Saitama looks back at Akaza that was about to charge, the hero says "aren't you going to tell me where's your master? If you don't, I'll finish you off right now..."

Akaza grits his teeth while saying "I DON'T GIVE A CRAP ABOUT YOU! I'LL KILL YOU UNTIL MY LAST BREATH!"

Akaza can notice the sun is about to rise but he continue being extremely aggressive towards the hero, he then says "I don't care if I die...I will fulfill my duty from my master!"

Before Akaza can attack Saitama, a memory suddenly flashes in his mind.

A young girl smiling as Akaza can see the mysterious flashback, the girl says "Hakuji, I'm always right behind you, okay...? So please stop murdering people.."

The flashback made Akaza paused as he was frozen in shock and thinks "who was that woman? Why did she appear in my mind...? As if I know her..." In doubting tone.

Akaza can see Saitama posing his attack and is now ready to unleash his technique

The hero says "it's a shame that you refuse to side with us, but whatever..."

Saitama in serious tone says "Serious Series, Power Breathing Third Form..."

Saitama swings his sword towards the shocked Akaza who can't react.

Saitama in serious tone finishes off Akaza by slashing the demon off "...Serious Slash"

(Slash)

(Loud Tremor)

(Shockwaves)

Akaza can see the death in his eyes as his eyes flashes in bright light.

Saitama's slash damages the entire surrounding that was affected by it, a loud tremor is heard.

Did Akaza died?

The flying debris falls down the ground, there are casualties in the surroundings after the fight.

And the sun is rising up, brightening the dark environment.

(Sigh of happiness)

The flame pillar Rengoku smiles brightly to the hero, he chuckled and says "good job mister Saitama... you manage to defeat him..."

Rengoku gasps air as he looks at the skies with relieved look and sighed deeply "I'm gonna take those kids as my tsuguko if they agree....I'm so glad I'm alive and to live another day..."

Tanjiro, Zenitsu and Inosuke was crying, they can't contain their happiness after all of them are alive after the mission, not to mention the upper moon encounter.

With Saitama around, their safety was guaranteed.

Saitama landed in the ground and saw Rengoku collapsed and fainted while still kneeling down.

(Crying)

Tanjiro continues to sob as he can't contain his happiness after the battle "I'm glad mister Rengoku was alright....I'm very happy....!"

Inosuke tried to act tough while holding his cry "s-stop crying you fool! W-we are alive after that encounter...I thought you are not a crybaby...damn it I can't stop..." Inosuke cries again.

Zenitsu is seen falling asleep due to exhaustion, making a snoring sounds "zzzzZzzZzZZ...."

Saitama walks around them and smiles with satisfaction, the hero would look up with satisfied look and says "damn, I don't know that the demon is strong, I wonder if he is an upper moon since he can kill a pillar.."

The hero was just clueless that he fought upper moon 3

The hero crosses his arm and says "my haori and my uniform is all dirty, and right now I want to take a bath in a hot tub...I wonder if they have some hot spring here.."

The squad and the pillars are safe and sound, the Kakushis are approaching them