Today was a bad day for the four aliens. They're supposed to retrieve a gemstone from the city museum, yet they instead chased a strange creature armed with a sword (Meta Knight) and failed, stumbled upon the superhumans in the sewers and lose in the fight. And now, not far from an abandoned building in the outskirts of the city, they sat on the ground with their upper torsos tied and their weapons got confiscated. The three superhumans; Kokushibou, Kaigaku and Douma stood behind them while in front of the aliens were a small group of Erionian military police led by Captain Eurydox.

"I swear if I successfully released myself, i'll personally have your guts fed to the Bulerian giant worms!" Mordrezan threatened.

Mordrezan received a kick from behind by Kokushibou.

"Save your speech for another time, weakling" Kokushibou seethed.

"Actually I'm feel pity for you, but you guys should learn some manners" Douma chuckled. "It's right, Kokushibou?"

"Tch" Kokushibou only turned away his face.

"Noble superhumans, I must thank you for helping us tracking down these...garbages" Eurydox thanked the superhumans. "I'm amused to hear the fact that your organisation is the most-performing amongst the affiliated groups in the Far Northeast"

"What are you calling us!?" Vozurek was enraged.

Douma however managed to pin the alien on the ground.

"My master is a perfect man, that's why i'm loyal to them" Kokushibou replied.

"You got the point, Kokushibou" Eurydox chuckled. "Your master have a quality of an Erionian"

Eurydox then knelt in front of the aliens.

"Now tell me, vile alien" Eurydox grabbed Mordrezan's hair. "Where's Zargoror?"

"I won't tell you even if you throw me into a volcano" Mordrezan was unfazed.

"Stupid!" Eurydox violently shaked Mordrezan's head for a few seconds.

Eurydox then stood again in front of the aliens.

"I'm understand if mindless scavengers like you refused to cooperate with us" Eurydox said. "But you'll have to rot in prison for that!"

"You're the one who will rot!" Mordrezan growled.

Unbeknownst to them, someone just spying on them from the inside of the building.

...

Inside the abandoned building, a mysterious man watched their conversation from there using a pair of binoculars. He wore a black hooded leather jacket with black gas mask, black pants and black rubber boots. Not much information known about him, but he's one of the agents of the Dark Tunnel.

"Agent Goro, please respond, over!"

Goro quickly took his walkie-talkie.

"Goro's here, over!"

"Agent Goro, how's the current situation? Over!"

"Those superhumans bring their alien hostages with them, over!" Goro answered.

"Alien hostages?"

"They're going to hand over their hostages to the Erionians, over!"

"Aaargh!"

Out of sudden, Goro heard a short scream from outside of the room.

"Wait for a while, I'll be right back, over!"

As Goro exited the room, he saw an Erionian enforcer was lying unconscious on the ground, as if he was ambushed by someone. The agent suspected there was someone else hiding inside the building.

He carefully walked towards the door at the of the hallway as he pulled out his laser gun, prepared for any possible incoming attacks.

"Your playtime is over now!" Goro violently kicked the door.

However, as Goro finally left the hallway, someone just opened the door of the nearby room as he peeked from inside.

It was Hinatsuru, a kunoichi of the Slayers and one of Tengen's three wives. It's unknown why she was there in the first place.

...

It was a dire situation for the Pillars of the Demon Slayer Corps after they arrived in this far-advanced city. Inside a building-in-construction, the counterparts of Muichirou, Giyuu and Sanemi were getting chased by a squad of Erionian military police led by Captain Starlounas.

"Go! Go! Go!" One of the Erionians shouted as the Erionians marched inside the building.

The pillars skillfully dodged every laser shots from the pursuers as they ran upwards through the stairs.

"Damn it, they won't give up at all!" Other Sanemi growled.

"We need to keep moving!" Other Giyuu said.

"Don't ever let those cowards from escaping!" Starlounas ordered valiantly.

The pillars reached the second floor, but this wasn't over yet. Several laser drones flew from outside, firing against them.

"These flying objects again?" Other Giyuu was frustrated.

Drones may not existed yet in Taisho Era, but that doesn't mean their nichirin blades were useless against them. The pillars managed to cut these drones in just a few seconds.

"Hahaha! Do you think your weird weapons are useful against us? It's not!" Other Sanemi mocked.

"Damn you!" Starlounas was enraged as he released a shot, narrowly missed the Water Pillar.

"Well, my blades only touch the flesh of demons, but I wouldn't mind it if you want to have a taste of it!" Other Sanemi grinned.

"Just surrender already!" Starlounas screamed desperately.

"Can you repeat again? I can't hear you" Other Muichirou mocked.

"Sorry, my answer is no!" Other Giyuu replied.

Starlounas was very angry, why they're too stubborn to surrender? They were chasing a small group of three swordsmen who don't even know what's a phone, yet how they're fighting are far more better than his own men, much to his own chagrin. His reputation will tarnished badly if he kept failing in pursuing those 'cavemen'.

To be continued...