System: My Doomsday Train Chapter 981 - 368: "If You Can Draw This Bow...

"Kasha civilization?"

Standing on the street, Chen Mang gave a pensive nod while surveying his surroundings. By now, he had arrived at a planet belonging to the "Rough Civilization." This world wasn't some bustling trade hub at the heart of a star system, nor a crowded vacation spot teeming with visitors.

Definitely not a fortress world or a factory planet either.

Simply a standard living planet.

Nothing special stood out about it.

The planet's sole purpose was housing a group of the Rough Civilization's people, yet such worlds truly capture the everyday essence of a society's base layer.

Kasha civilization.

This was a civilization he recalled vividly—one of the mightiest he'd faced since departing Water Blue Star. Back then, the Kasha civilization appeared divine to him, like an invincible juggernaut.

He was well aware of their alarmingly low birth rates. Even they couldn't pinpoint the cause; he simply never imagined it stemmed from the "Cyan Mountain Civilization."

"They've got some serious reach."

"How did they pull it off?"

"A virus spread via sex."

"Sex? That transmission method shouldn't proliferate so massively. Dropping a species' birth rate requires hitting at least 90% of the populace. HIV spreads sexually too, yet no population sees 90% infection rates."

Chen Mang shook his head. "From my knowledge, the Kasha civilization only had mild internal decay, nothing wildly promiscuous. It has to spread through other channels too."

Ai agreed with a nod before explaining further, "It's not purely sexual transmission. The Cyan Mountain civilization's virus doesn't require physical intimacy. Merely harboring sexual thoughts about another guarantees 100% infection."

"Take this—"

"Spot a stunning woman on the street, and impure thoughts flash through your head. Even if you never act, never even draw near or do anything, the virus jumps at that very instant of fantasy."

"Celebrities fell first among the victims."

"What's more..."

"Pubescent teens frequently entertain brief taboo fantasies about parents, cousins, or kin. These harmless, unacted-upon urges mark normal growing pains."

"Yet this virus twists them into something sinister."

"Cyan Mountain civilization's records show that, irrespective of gender, individuals average just six real physical partners over a lifetime."

"But fantasies? At minimum, 3929 others."

"Thus—"

"The spread exploded across the Kasha civilization overnight. Impressed by its potency, the Cyan Mountain civilization refined it for deployment against the 'Rough Civilization.'"

"The targeting of Rough is my speculation. Cyan Mountain covered tracks flawlessly—no hard proof remains."

"Got it."

With a subtle nod, Chen Mang gazed skyward at the stars. "Cyan Mountain civilization strikes the Nia Star System not just to neutralize Human Civilization's threat, but to obliterate the system entirely."

"Nia Star System likely retains proof of 'Cyan Mountain Civilization' sabotaging the 'Rough Civilization,' plus remnants of the Kasha experiment."

"Cyan Mountain fears Human Civilization's explosive growth drawing Rough eyes, unveiling the scheme."

"True, Rough Civilization currently wants for leaders—"

"But discovery would unleash their wrath, vaporizing Cyan Mountain effortlessly."

"No surprise..."

"No surprise Cyan Mountain risks everything to wipe out Nia Star System."

"I'm puzzled by that," Ai admitted uncertainly. "On paper, Cyan Mountain scrubbed their own records spotless. Any Nia traces should've been purged too. Why gamble so hugely just to visit?"

"Exactly."

Chen Mang nodded faintly. "Cheaters erase affair proof obsessively, yet panic when spouses scour phones or profiles, doubting total erasure."

"Cyan Mountain civilization freaked out."

"Hence, flattening my Nia Star System to 2D—no loose ends."

"The deeper I dwell on it, the more it boils my blood, damn them..."

...

The Cyan Mountain civilization's scheme lacks solid proof, but the puzzle's mostly assembled.

If...

If he tipped off Rough Civilization pre-battle with Cyan Mountain, they'd handle it without his involvement. Naturally, he won't—surrendering his assets like that? No way.

"..."

Chen Mang strolled a city on "Qiu Mountain Star." Pedestrians shot him odd looks now and then. Not aggressive, merely intrigued.

Folk of the "Rough Civilization" aren't Human Race, but "Star Arrow Race."

They start as regular humans until chosen by gods.

Turning "Berserker" warps their bodies red, massive, towering—pure powerhouses.

Opting for "Divine Archer" yields lithe, elongated builds, sharp ears, and a forehead third eye.