A Mysterious Commission from Ten Years Ago, The Echoes of the Past...

Under the starlit sky, a new chapter of Fate/staynight unfolds.

A series of thrilling scenes flashes by. At a murder scene sealed off by police tape, a sharp-eyed, mustached detective effortlessly deduces the identity of the young culprit using his "psychological detective method."

[At Iwai Beach, surrounded by officers, a woman kneels, weeping in remorse.]

["I killed her, but I had no choice!"]

["Every night, she'd be upstairs tap-dancing. I tried to reason with her, but she wouldn't listen!"]

["Every night I'd get anxious and couldn't sleep... killing her was the only way!"]

["I have my own burdens too!"]

[The police officers exchange uneasy glances, and the head inspector in a brown hat coughs quietly. "Take her back to the station… Let's wrap it up."]

[Before leaving, the inspector pats Kogoro Mori on the shoulder, grinning. "Thanks again, Mori."]

["Ahahaha~ What can I say, I'm the great Detective Kogoro Mori."]

[The mustached detective lets out a hearty laugh, reverting to his usual, greasy self after solving the case.]

[Noticing the admiring gazes from the bikini-clad ladies around him, he laughs so hard he's almost in tears, his tongue sticking out in a peculiar way.]

[Cu Chulainn covers his face, unconsciously inching away, feeling a bit embarrassed.]

People worldwide, after recovering from their initial shock, begin to tease.

"Kogoro can't stay cool for more than three seconds…"

"But during the murder investigation, he was unexpectedly dashing."

"Agreed, any man looks good when he saves the day at a critical moment."

"What's with this Inspector Megure always calling people 'buddy'?"

"Maybe he's got the Buddy Buddy Fruit powers (whispers)."

"Did anyone else notice the dog guy's exasperated look? Haha."

"Dog guy, really?"

"Calling him Poochie works too."

"Hey, hey, he's the fierce hound of Cu, don't make him sound so cute."

"I wonder… does Cu Chulainn like eating dog meat?"

"Dude, where did you even get that idea?"

"Dogs are adorable; why would anyone eat them?"

…

Meanwhile, reporters from every major Japanese news outlet are rushing to Mouri's office.

They are determined to score an exclusive interview with the bumbling detective!

What? You say the Kogoro Mouri in this parallel world has nothing to do with the one here?

Who cares, as long as it sells!

But Mori's daughter, Ran, has wisely shut the doors, retreating into the small office, sealing herself off from the chaos outside.

…

[At Kiyomura Sushi in Shinjuku 3-chome, the Lancer crew is digging into their meal.]

[Cu Chulainn bites heartily into a rice ball, casting a sidelong glance at his Master, casually commenting, "Hey, Master, if you could keep your serious face on during investigations, you'd be a real hit with the ladies."]

[At this, the mustached detective bursts out laughing, "That's not gonna happen—Kogoro Mori has never been the serious type."]

["...I honestly don't know what to say about you."]

[Cu Chulainn mutters, "But, truth be told, you're worthy of being my Master. I underestimated you before—that was my bad."]

[Mori waves it off, "No big deal, really."]

[Cu Chulainn, intrigued, asks, "Oh? So, what do you consider a big deal?"]

[The mustached detective ponders for a moment before responding calmly, "There's nothing big in life; just take things as they come."]

[The blue-clad lancer nods in agreement. "Makes sense. Let's have a toast to that, Master!"]

[Saying this, he raises his cup, and Mouri, grinning, raises his as well.]

[With the sound of clinking glasses, the two of them smile broadly and down their drinks.]

[In the lively atmosphere, Cu Chulainn, emboldened by a bit of alcohol, asks, "So about that commission—you were supposed to protect that little girl. Did you find her?"]

[Mouri nods, "I have a lead. I even asked Inspector Megure to keep an eye out. But it's been ten years since the commission—she must be all grown up by now."]

[With a sigh, the mustached detective lifts the old commission letter.]

[The handwriting on the paper is elegant and refined, a deep sentiment embedded in every stroke.]

[A small photo of a dark-haired girl is tucked inside, her face blank, as if unaware of what's to come…]

[The signature at the bottom reads, Yukinoshita Haruno.]

Stunned by the details, people everywhere pause in confusion.

"Yukinoshita Haruno—who's that?"

"No idea. Anyone know her in real life?"

"Could it be that family from Chiba—the Yukinoshitas?"

"Seems likely. The eldest daughter of the Yukinoshita family is named Haruno."

"Wait, can someone clarify this mystery? Any details?"

"From what I've heard, they're just a small local landowner family in the area."

"Got it, time to spend a few billion to buy up the Yukinoshita family."

"Buy what? Chiba's bigger than Tokyo and Kanagawa combined."

"The entire economic output of Chiba is higher than the GDP of certain provinces in that large nation—families like the Yukinoshita are akin to a provincial powerhouse."

"Do you even understand what it means to be part of Chiba's elite? Assets worth billions of dollars, with total controlled assets nearing six or seven billion..."

"In yen, that's in the trillions. Not to mention, Yukinoshita Haruno's mother is a prefectural council member, and if she advances further, she could even join the national Diet, one of those few who truly hold the power of life and death over the country!"

"99.99% of people will go their whole lives without ever meeting someone of that rank!"

"And you call this 'small-time landowners'? Becoming the Yukinoshita family's son-in-law would be like hitting the jackpot!"

"So, no matter the world, Yukinoshita Haruno is always a standout among people, right..."

"Too bad she died young. I wonder why..."

...

"My sister... is dead?"

In the world of the Celestial Veil, Yukinoshita Yukino felt a pang of sadness.

In that moment, as she glimpsed the photo of the little girl, she recognized herself as a child.

Just the thought that even after her death, Haruno still thought of her—it almost brought Yukino to tears.

Suddenly, a playful voice broke in.

"Aww, little Yukino, are you feeling sad for me? It makes your dear onee-chan so happy."

Yukinoshita Haruno came over with a playful smile, patting her adorable sister's head.

"Who's worried about you, you obsessive sister!" Yukino hesitated, turning her head away as she wiped a tear from her eye, refusing to admit her feelings.

...

[The street bustled with people passing by, and two figures stood side by side.]

The spearman in blue, a confident smile on his face, said boldly, "Master, go on and find her without worry; Ireland's Son of Light will keep you safe."

"Haha, I know; you're unbeatable~," Kogoro Mori chuckled, reassured as he glanced at his Servant's profile.

[Height / Weight: 185 cm / 72 kg]

[Alignment: Lawful / Neutral]

["Undefeated in a hundred battles, the mighty among mortals."]

[Origin: Mythology]

[Region: Ireland]

[Strength: B]

[Endurance: C]

[Agility: A]

[Mana: C]

[Luck: E (spearmen are notoriously unlucky in legend)]

[Noble Phantasm: B]

Class Skill – Magic Resistance: C

Capable of nullifying spells with a chant of two verses or shorter. However, it cannot block large-scale spells, rituals, or grand magic.

Personal Skill – Battle Continuation: A

Can keep moving and fighting even after receiving life-threatening wounds.

(According to legend, the dying Cu Chulainn tied himself to a stone pillar and remained upright until his death.)

Resilience: C

Adept at reading the battle situation, capable of rejoining a fight swiftly after brief recuperation.

Rune Magic: B

Has the ability to use magic based on ancient Rune script.

(Cu Chulainn learned Rune magic from Scáthach, the queen of the Land of Shadows.)

(For a short period, can raise any stat with a B rank to an A, while also using rune-based defenses to counter petrifying Mystic Eyes.)

Protection Against Arrows: B

Able to dodge any ranged attack as long as he can visually track it.

Divinity: B

As a demi-god, Cu Chulainn was born with exceptional abilities and, even as a child, displayed extraordinary physical strength.

Noble Phantasm – Gáe Bolg, the Spear of Mortal Death

Rank: B

Type: Anti-Personnel

Range: 2–4

Maximum Target: 1

Cu Chulainn's trump card, a technique that defies causality: upon release, it creates the "effect" of piercing the opponent's heart.

(This technique has a slight charge-up time, making it susceptible to dodging by highly evasive opponents.)

(If the opponent has exceptionally high luck, this spear may miss its target.)

Noble Phantasm – Gáe Bolg Alternative: Piercing Spear of Death Flight

Rank: B+

Type: Anti-Army

Range: 5–40

Maximum Target: 50

This variation loses the "heart-piercing" guarantee, but its power and range are greatly amplified.

(Consuming intense magical energy, requiring all available mana.)

Its area of attack covers all space surrounding the target, akin to a devastating carpet-bombing. Even solid barriers or quick evasive maneuvers can't withstand this force, as it strikes down opponents en masse in one fierce blow.

Without question, as a lancer, Lancer ranks among the strongest of Servants!

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