Traveling Through Multiple Realms: The Supporting Character's Counterattack

The monster was clearly stunned by the fall, but it quickly struggled to its feet, its nearly six-meter-tall body exuding a strong sense of oppression.

It shook the water off its head, its two bulging, dead-fish eyes fixed on the iaido, and surprisingly, it spoke in a hoarse voice:

"Ugh... How dare they treat a noble deep-sea warrior like this!"

Seeing that Iai was alone and sensing little danger, it arrogantly puffed out its chest. "Such immense power... it seems you are the strongest among humans! Listen well, humans! I am an envoy from the deep sea, sent by the great Deep Sea King to inform you land creatures that we, the Deep Sea race, are about to conquer this barren land, and all humans will become our king's slaves! Those who know what's good for them..."

"Noisy."

Before it could finish speaking, Iai coldly interrupted it.

He had no interest in hearing even a single word of this malicious declaration of invasion.

With a flick of his wrist, Iaijutsu sent the fishing rod, wreathed in Armament Haki, flying out like a serpent. The tip of the rod sliced ​​through the air with a sharp whistle, its speed so great that it left a blurry black line in the air.

Pfft—!

With a soft sound, the deep-sea envoy's incessant chatter came to an abrupt halt.

A fine bloodstain appeared on its body from the midline, then it suddenly burst open, turning into countless pieces of flesh mixed with blue blood, which splashed onto the black reef and were instantly swept away by the waves that washed ashore.

Sold out instantly!

"Deep Sea Clan, has the plot progressed to this point?"

Iai recalled that in the original work, there seemed to be an invasion by the deep-sea race, which mainly occurred in the neighboring J City.

Unexpectedly, their vanguard scouts have come all the way to the coast of G City.

After pondering for a moment, Iai took out the special encrypted phone issued by the Hero Association and dialed the emergency contact channel directly.

"This is Iai-an. A vanguard of the Deep Sea Clan monsters was discovered on the eastern coastline of G City and has been eliminated. Based on their last words, it is highly likely that a large-scale invasion by the Deep Sea Clan army is imminent, with the primary target suspected to be the neighboring J City. It is recommended that the Association immediately issue a monster invasion warning to J City and all coastal cities, and evacuate coastal residents. The threat level may be at least 'Tiger' level, and possibly even 'Demon' level!"

He speaks very fast, but his points are clear and his information is accurate.

The operator's tense yet rapid confirmation and instructions came from the other end of the communication line.

After ending the call, Iai put away his phone and looked towards J City.

The sea breeze, carrying a salty, fishy smell and a faint, strange, bloody odor, rushed towards me.

"J City? It's not far."

Iai muttered to himself, a hint of interest flashing in his eyes.

The invasion of the deep-sea race was a crisis of moderate magnitude in the original work, but more importantly, it was during this event that that man appeared—a seemingly ordinary man who possessed absolute power, a being that could be described as a "bug" in this world.

"The Bald Demon King - Saitama".

A slight smile curved the corners of Iai's mouth.

Having arrived in this world, advanced to S-rank, and fused with numerous powers, he believed his strength had already made a leap forward.

But that existence that defies common sense remains like an insurmountable mountain, inspiring curiosity and awe.

"Go and see for yourself."

My mind is made up, and I will not delay any longer.

He casually packed up his fishing gear, put it in his backpack, and disappeared from the huge reef in a flash.

The next moment, he appeared on the coastal highway, speeding at full throttle, becoming a blur that was difficult to catch with the naked eye, and sped along the coastal highway towards J City.

He wants to witness the invasion firsthand, and perhaps even intervene when necessary.

But more importantly, I wanted to see for myself just how incredible the power of the man named Saitama truly was.

……

A few hours later.

The sea breeze whistled in his ears as Iai's figure sped along the coastal highway, leaving only a blurry afterimage.

As they approached J City, the salty, fishy smell in the air grew stronger, mixed with a faint hint of blood and a cold, viscous energy fluctuation belonging to a deep-sea monster.

From the direction of J City in the distance, faint sounds of explosions, screams, and the roar of some inhuman creature could be heard.

"Has it already started...?"

Iai's eyes narrowed, and his speed increased again.

A few minutes later, the outline of J City appeared on the horizon.

This coastal city, known for its port cargo and beach tourism, is now in chaos.

Thick smoke billowed from the area near the port, buildings collapsed, and panicked crowds could be seen everywhere on the streets, along with some strange, deep-sea monsters with gray-blue or dark green skin, wielding rough bone or coral weapons.

These deep-sea creatures' vanguard forces are brandishing their weapons, wantonly destroying the streets, and hunting down civilians who couldn't evacuate in time.

Screams, cries, and the monster's grotesque laughter mingled together, creating a hellish scene.

Some uniformed police officers and low-level heroes who rushed to the scene were putting up a fierce fight, but their weapons were of little effect on the tough-skinned deep-sea creatures, and they were often defeated in a single encounter, suffering heavy casualties.

"Their strength is mostly around the lower Tiger level!"

Iai quickly assessed that while these scattered soldiers posed little threat individually, their large numbers suggested that an even stronger main force was likely to follow.

His sharp gaze swept across the battlefield, instantly locking onto several locations where the situation was most critical.

"Whoosh!"

Iai's figure vanished like a ghost, reappearing on a chaotic commercial street.

Three deep-sea warriors were surrounding a mother and daughter huddled in a corner, trembling with fear, their piercing laughter echoing as sharp bone spears were about to strike.

"cut!"

Iaido swung his fishing rod, and the glistening fishing line flew out at lightning speed.

laugh!laugh!laugh!

The fishing line seemed to have a life of its own, drawing a strange arc in the air before precisely slicing across the necks of the three deep-sea warriors.

The deep-sea warrior's sinister grin froze on his face as his head flew into the air, spurting blue blood.

The mother and daughter stared blankly at Iai, who had suddenly appeared and instantly defeated the monster, their faces filled with the joy of surviving a disaster.

"Get to the shelter immediately!"

Iai left behind a sentence, and his figure disappeared again.

The next moment, he appeared on the roof of a crumbling building. Below, in the plaza, dozens of deep-sea creatures were besieging a squad of several B- and C-level heroes, who were in grave danger.

Iai's gaze turned cold, and he swung his fishing rod again.

"Hiss hiss hiss—!"

A silver streak pierced the sky, spanning dozens of meters and instantly passing over seven or eight deep-sea warriors. They seemed to be paused, frozen in place, and then their massive bodies suddenly collapsed, shattering into chunks of flesh.

The other deep-sea warriors, witnessing this terrifying sight, screamed in terror and tried to flee the scene, but the silver light flashed again, and they followed in their footsteps.

"He's an S-class hero!"

"Master Iaian has arrived!"

"That's incredible!"

The heroes, who had escaped from dire straits, let out joyful shouts, their morale soaring.

Iai didn't stop, but sped through the port area like firefighters. Wherever he went, silver lines crisscrossed, and deep-sea warriors fell like grass, greatly relieving the local pressure.