Zenitsu was running around at the Mount Natagumo forest when he was chased by a small spider with human head.

"Please be a dream! Please be a dream! Please be a dream!!!" Zenitsu in yelling tone while panicking.

He looks behind while running around but the spider is still chasing him with its terrifying grin. The spider even wink at Zenitsu.

"Kyaaahhh!" Zentisu screams as he sprinted at a faster speed.

Meanwhile Saitama appears beside Zenitsu as he races with him.

Zenitsu was relieved but he is still panicking because of the spider chasing him.

"Mister Saitama!! There's a spider with a human face, it's behind me!!!" The scared Zenitsu in yelling tone.

"Calm down will you? You are just making them like you to get chased.." Saitama in his calm expression.

"Nooo! I can't stop!" Zentisu sprinted more faster.

Saitama looks behind as he noticed that the small spider is now gone as he says "calm down, the spider is now out of our sight" while still running with Zenitsu

"Really??" Zenitsu stops running as he pant heavily and recover his breath.

He noticed that his Chuntaro is just hiding in his kimono. Chuntaro jumps and rests at Zenitsu's head.

Zenitsu takes a deep breath when he calm down, but suddenly he burst out complaining things "I'm sure these spiders are just trying to survive, too, but still!" He then shiver.

Saitama was just staring at him blankly, he didn't know that Zenitsu also fear spiders.

The hero put his hands around his waist as he says "come on, let's just go around and find Tanjiro and Inosuke.."

"Y-yes! That's a good idea-- wait a minute! You left me alone earlier didn't you!?" Zenitsu with a sobbing yet mad face.

Saitama looks at him with the same expression as he answers Zenitsu in calm tone "I'm sorry if I left you, but today, I won't leave you now" the hero then smiles

Zenitsu let out a relief sigh as he walks beside Saitama. "Mister Saitama aren't you scared of the demons?" in curious tone.

Saitama was looking at Zenitsu's bird while talking "well I'm not scared at all, they may be dangerous but they won't be able to harm me anyway..."

Zenitsu after hearing it goes like "is this even possible? You? Can't be harmed!? Unfairrrr!" In complaining tone.

Zenitsu goes whining as he says "I also want that ability!!"

"Can you just close your mouth instead of being so loud in this quiet night!?" Saitama in disciplining tone.

"Yes sir!" Zenitsu acting obedient as he walk beside Saitama, his sparrow also behaves around his head.

They walk for a few meters until they arrive at the location with unpleasant smell.

"What the hell is this smell!? More irritating than the once we are in the Tsuzumi Mansion....!" Saitama in complaining tone as he cover his nose with his fingers.

The hero becomes annoyed of the dirty air that surround them, they can even see some corpses that are hanging around the threads

The small hut that is also above them, tied with threads like a spider web.

Zenitsu steps back as he also cover his nose "talk about pungent! If Tanjiro was here, he would scream and complain more than me!"

Saitama gestures Zenitsu to shut up, the hero is observing at the malicious creature creeping out in the hut.

The giant spider demon nicknamed "Son" with human head went down using a thread. The demon grins at Saitama and the scared Zenitsu with a creepy look "oh some visitors huh?"

The menacing grin of the spider demon makes Zenitsu and Chuntaro shiver in fear.

But for Saitama, his poker face remains. The hero doesn't show any fear as he is full of openings.

"Ok" Saitama in calm yet uninterested look.

The spider demon lost interest of Saitama because the demon sees the hero as a weakling.

Instead...

The demon only looks at the scared Zenitsu and Chuntaro as he speaks "well well, do you want to become one of my minions? Kukuku~"

"S-shut up! Don't talk to me you giant demon!" Zenitsu in scared yet brave tone.

The demon snicker as he says "you already know how dire your situation is, don't you?"

Saitama noticed why the spider demon is laughing at Zenitsu. So the hero checks Zenitsu and his eyes goes wide "kiddo! Your hand...!"

"H-huh?" Zenitsu stares at his hand that has already infected with poison.

He was silent until he suddenly burst out sobbing and panicking "mister Saitama! What should I do!?"

The demon grins widely in satisfaction after seeing Zentisu was poisoned and even panicking.

"Too bad, you will become one of my little minion like the other demon slayers I captured! Kukukuku~" the demon in mocking tone

The spider demon then looks at the blank Saitama, the demon was disgusted as he say "how come my minion didn't pierced that skin of yours, you must be a strong foe huh?"

The spider demon then snicker as he look back at Zenitsu "now let me explain about what happen to your body after the poison..."

The demon then start to get a time watch as he gesture it with his limb "when the needle arrives here, you'll start to feel tingling and pain in your limbs...fufufu~"

Then the demon continue to explain about what would happen to Zenitsu after the time goes at the quarter.

"At 15 minutes, you'll feel intense pain and your body trembles, not only that you'll feel dizzy and loses your consciousness kwahahaha~" evil laugh of the spider "Son" demon .

Then the demon continues to explain "after that, you'll drop down, but don't worry, after you wake up, you are already shrunk and become a minion of mine kwahahahaha~"

When the demon was laughing, he saw Zenitsu was already climbing up in the tree with scared look

"Shut up, just shut up! I don't like to become a spider like you! Help me mister Saitama!!" Yelling tone of the sobbing Zenitsu.

The demon raises an eyebrow when he talk about the badly "huh? So that baldy's name was Saitama huh--" when he looks for Saitama, he just realized that Saitama was already gone from his sight "where did that baldy go!? Don't tell me he left this pathetic boy to me huh!?"

"Nope, I'm right behind you, now you should just perish you disgusting spider.." serious tone of Saitama who just appear behind the demon. Saitama was about to unsheathe his short sword to cut the demon.

"W-what the heck!?" The demon gets startled and shows fearful expression "he's fast....is he a hashira..!?"

The demon spits an acidic liquid towards the serious Saitama, but the hero disappears from his sight in microseconds.

"What the hell is he!? How can he move faster than my eye!?" the demon in complaining tone as he panick and look around. The demon backs off while trying to distance himself.

The nervous and anxious demon saw Saitama below his hut, the demon's face has a pale like expression "you pathetic human, I'll kill you!"

"Oi.... I'll never forgive you for hurting Zenitsu..." Cold tone of Saitama as he look above at the scared demon. The hands of Saitama is always around the sword to unsheathe.

The demon gets angry but also scared at the same time, the demon orders his minion to swarm Saitama around. "Minions! Eat that baldy alive!!"

The 30 spider minions with human face goes around to swarm Saitama.

Saitama was surprised as he asked "so this is what would happen to Zenitsu huh?" The hero was surrounded and was covered by the spider minions.

But Saitama does a one punch, his shockwaves sent the minions flying away from his sight.

"Impossible!! " The demon who was surprised and now extremely anxious of Saitama. The demon can't believe how a human like Saitama can one punch his minions like it was just a pebble for him.

The demon continue to spit acidic liquid while also moving away from the hero, but....

Saitama dashes, the ground leaves a crack due to Saitama's powerful force of footwork.

"Are you planning to dirty my haori you jerk???!" Saitama in angry tone

The hero then grip his weapon as he moves at insane speed which the "Son" demon can't react.

"D-dont come closer!!" The panicking demon spits more acidic liquid but Saitama evades.

Saitama was just playing around with the spider Son demon, the hero can just kill him off but Saitama was just waiting for someone to have their revenge. The hero was just giving time as distraction.

"Stop spitting man, don't dirty my clothes or else I'll bash your head with my shoes!" Says the serious Saitama

The demon also orders his minions to swarm the hero but was killed by Saitama's powerful hit and run.

But....

The unconscious Zenitsu suddenly goes down from the tree while bending to pose his breathing technique. Zenitsu was just moving at his sleep.

"Thunder breathing, first form...." The unconscious Zentisu who was on a standby

"Eeek!??" The demon becomes wary and cautious of Zenitsu.

The demon in his inner thoughts "this kid was just a scared brat before, but now he acts like a brave swordsman!!"

"Oi, don't get distracted!" The serious Saitama behind the