They won the Holy Grail War, but this turned out to be the Virtual Tree Universe.

Chapter 8 This is a world with ghosts
Seeing that he had summoned another Assassin, and it was summoned without any artifacts but through affinity, Dan Lei suddenly began to wonder if he really had a connection with the Assassin class. Could it be that he had used too many Assassins in the last two years of playing FGO?
However, Danlei said he could understand having a connection with this servant.

Assassin's real name is Sasaki Kojiro, and he is probably the first Assassin-class Servant in the Fate series of games and related anime.

In FGO, during the first year after the game's launch, this character, thanks to his Assassin class and extremely low acquisition cost, appeared frequently in the first chapter of the story for free-to-play players and in subsequent quests where players needed to farm Dragon Fang materials, becoming a Dragon Slayer in the hands of free-to-play players.

Of course, Dan Lei was also one of them, and for a period of time afterward, Sasaki Kojiro was still the most cost-effective fighting star. Anyway, Dan Lei really used him for a long time, and later, out of nostalgia, he even used the Holy Grail to level him up to level 100.

So Danlei raised his left hand, as if seeing an old friend, and said...

"Assassin, I am your Master."

Sasaki Kojiro saw the Command Seal on Danlei's left hand, said nothing more, and bowed slightly.

"The contract is established, Master."

Seeing this, Danlei immediately used magic to lift the deer beside him, which had already fainted from excessive blood loss, and used the power of abundance to heal its wounds, lest it die before finding any seasoning. He then said...
"Assassin, there is no Holy Grail War here, so there is no need to hide your real name. I will call you Sasaki in private, and you can call me Danlei."

Let's get some seasonings and figure out how to cook this deer. It's better to strengthen our bond over dinner.

Seeing Danlei's carefree attitude, Sasaki Kojiro was quite satisfied. After all, he didn't want to follow a strict Master, so he followed and said...
"Understood, Danlei."

Since Danlei landed on the mountain, the only way to find people is to go down the mountain.

However, after walking only a few steps, Sasaki Kojiro suddenly appeared in front of Dan Lei and said, facing one direction...

"Danlei, I heard someone running frantically ahead, and I smelled blood."

Upon hearing this, Dan Lei said that he hadn't felt anything at all. Sure enough, his senses were still quite different from those of these martial artists who had undergone countless trials.

However, the loss of the five senses can be remedied with magic. Dan Lei only slightly increased the sound absorption of his ears and heard unusually panicked panting and running sounds coming from the direction that Sasaki Kojiro was facing.

Desiring to quickly gain access to information about this world, Danlei decided to get involved.

In short, go and see what happened first, then decide how to deal with it.

So Dan Lei used the Cloud Chant Technique to create a mist that enveloped himself. A few seconds later, the light around Dan Lei distorted, his figure disappeared, and even his scent, sound, and heat were concealed.

The only thing that could give away their identity was the footprints in the snow.

However, for Danlei, it wasn't too difficult to use magic to reduce his weight and then jump up the tree; he could simply walk on the tree afterwards.

As for Sasaki Kojiro, how about becoming a spirit?

Walking up the trees, Danlei soon spotted people running frantically ahead.

Moreover, upon seeing this person, Dan Lei was certain which world this was, and even knew the timeline of the story.

There's no way around it, this person is just too iconic.

He had short, deep red hair, matching red pupils, a prominent burn scar on his left forehead, a green and black plaid coat, and carried a living corpse on his back.

This is clearly Tanjiro Kamado, the protagonist of "Demon Slayer." At this moment, after his house was attacked by Muzan Kibutsuji, he was unaware of anything and was carrying his sister, who had already become a demon, down the mountain seeking treatment. Sure enough, as Nezuko Kamado began to sway wildly after turning into a demon, Tanjiro lost his balance and fell off the mountain path, tumbling down the slope.

The thick snow has provided the best buffer, otherwise, if there were any protruding rocks on the hillside, Tanjiro Kamado would have been wiped out on the spot.

As in the story, Tanjiro was unharmed after falling to the ground, but Nezuko had already completed her demon transformation and, due to the demon blood, temporarily lost her mind and lunged at Tanjiro.

However, Dan Lei stopped watching at this point, as it was completely unnecessary to compare the hardness of Tanjiro's wood-chopping axe handle with Nezuko's teeth.

Dan Lei immediately released the Cloud Chant Technique, gathered the magic strings that controlled the puppet, and bound Nezuko, who was lunging at Tanjiro, into a tight knot in mid-air. Then he jumped down from the tree and said...
"Is this what a ghost is? It doesn't seem much different from a Dead Apostle."

Tanjiro was startled by Nezuko's ferocious appearance and looked completely shaken.

So Danlei went straight to Nezuko's side, since she had just become a demon and didn't have the strength she would have in the later stages of the story.

Dan Lei even went so far as to pluck a few strands of her hair and collect them, intending to use them later to study the nature of ghosts.

However, just as Dan Lei was about to pinch Nezuko's hands and feet to examine her flesh, Tanjiro finally reacted, charging at Dan Lei and roaring...
"Hey! Stay away from Nezuko!"

However, Danlei kept his eyes on Tanjiro and had no interest in experiencing his iron head.

So when Tanjiro was halfway through his charge, Danlei easily turned around and dodged, grabbing Tanjiro by the collar and neutralizing the impact.

All I can say is that Tanjiro is just an ordinary person now, so Danlei's skills are enough to easily outmaneuver him.

However, after casually tossing Tanjiro into the snow, Danlei still managed to explain.
"Young man, I just saved you."

This girl may have been your family member before, but she has clearly turned into a demon now.

"If I hadn't restrained her, she would have pounced on you and bit you just now."

Tanjiro knew that the person who suddenly appeared was telling the truth, but he refused to accept it and could only say it through his tears.
"Nezuko wouldn't! She absolutely wouldn't! She's so gentle, even... even if she really became a demon, she could control herself!!"

In response to Tanjiro's words, Dan Lei could only retort, "Only you, the protagonist, can have your words become law. Otherwise, try it with any other family, and your sister, who has become a demon, would eat your brother in no time."

However, just as Dan Lei thought to himself, as soon as Tanjiro expressed his belief in Nezuko, the fierceness in Nezuko's eyes instantly diminished by more than half. Although she was still struggling instinctively, she was crying, watching her brother cry.

However, he certainly couldn't just abandon Nezuko like that. To get involved in the later plot, it would be best to have an identity. Besides, Danlei was somewhat interested in the Breathing Technique, so he had to keep up the act for a while.

So Danlei deliberately made his hands burst into flames and said to Nezuko...

"I understand how you feel, but your sister is no longer human."

For her now, the best outcome is to have her cremated and offered prayers here; otherwise, you can't afford to cause harm to innocent people later.

After saying that, Dan Lei used the Cloud Chant Technique to summon water vapor, and then directly froze Tanjiro's feet on the ground.

Because Sasaki Kojiro had already told Danlei that the last guest had arrived.

(End of this chapter)