On Mount Sagiriya, a young man, who looked no older than sixteen or seventeen, was tirelessly swinging a long sword.
"…997, 998, 999, 1000."
The boy wiped the sweat from his forehead. At that moment, a man in a Tengu mask silently appeared beside him.
"Xander, I heard someone has gone missing at the foot of the mountain. It might be a demon. Come with me," he said.
"Yes, Grandpa Urokodaki," Lin Guang replied.
Xander sheathed his knife and followed Sakonji Urokodaki, his mind filled with thoughts.
"Yesterday, Elder Brother Giyu sent a message hoping that Grandpa Urokodaki would train the boy with the demon to become a swordsman who hunts demons. It seems the story has already begun."
"Finally, my system can activate."
Indeed, Xander's soul was not from this world but from the otaku world of earth.
Due to frequent sleep deprivation from watching anime and playing games, he suddenly died at home, but his soul reincarnated as an abandoned child in the world of 'Demon Slayer.'
Later, he was taken in and adopted by Sakonji Urokodaki, and when Xander saw Urokodaki's Tengu mask, he realized he was in the world of 'Demon Slayer.'
When Xander was transported to this world, he was already connected to the traveler's golden finger, but one condition had to be fulfilled for activation.
Namely, to kill a demon before Tanjiro.
"We're here," Sakonji Urokodaki's voice brought Xander back to reality.
Following Urokodaki's gaze, Xander saw a dim light emanating from a family shrine in the distance.
As they approached the shrine, he saw the light suddenly vanish, and two figures emerged from it. A young man in a checkered shirt swung an axe, cutting through the demon's neck, forcing it to retreat.
Seeing this figure, Xander realized his guess was correct:
— That's Tanjiro Kamado, so Nezuko must be nearby.
Urokodaki observed Tanjiro as he struggled with the demon and was about to attack.
Suddenly, Nezuko appeared beside Tanjiro and kicked the demon's head away.
Watching this scene, Urokodaki recalled the letter from Tomioka Giyu.
— Is this the boy with the demon that Giyu mentioned in his letter?
At that moment, the headless body and Nezuko began to fight, while the fallen demon's head sprouted hands to wrap around Tanjiro.
Urokodaki stayed still, but Xander could no longer hold back. This was the perfect moment to activate the system.
Xander slightly opened his mouth and inhaled.
— Water Breathing! Fourth Form! Striking Tide!
Blue water splashed from the blade, slicing the demon's body in half, preventing it from moving. The demon's head also lost consciousness due to the death of its body.
Tanjiro released the axe, which fell to the ground, pinning the demon's head to the earth.
At that moment, Tanjiro's voice sounded in Xander's ears.
"Are you... are you from the Demon Slayer Corps?"
Xander shook his head:
"My name is Xander . I'm not yet a member of the Demon Slayer Corps, but one day I will join them."
Tanjiro said:
"My name is Tanjiro, and this is my sister Nezuko. I believe you'll definitely be able to join the Demon Slayer Corps."
"Thank you, but let's deal with this demon first." Xander headed towards the demon's head on the ground.
At that moment, the unconscious demon woke up.
"What happened? Why did the body suddenly die?"
Seeing Xander next to Tanjiro, it immediately shouted:
"Hey! It was you, little demon, who killed my body! Come here, I want to eat you!"
Xander drew the Sun Wheel Cutter and with one swift motion sliced off the demon's head:
"I hope in your next life you don't become a demon again."
"Ah!"
A piercing scream rang through the sky.
With the scream, the demon dissipated into the air.
An intellectual voice echoed in Lin Guang's mind.
[The host kills an ordinary demon, and the World Chest System is activated]
[Current world - Demon Slayer]
[Each time the host kills a demon, there is a certain chance a chest will drop.]
[Reward for activating the system: 1 Initial Chest.]
Xander smiled slightly:
"Finally, it's activated."
Tanjiro witnessed this incredible scene, stepped back with his mouth open, and his face filled with horror.
"Well done."
A man wearing a Tengu mask appeared silently.
"You've thoroughly mastered the breathing technique. You handled the demon flawlessly without hesitation."
Upon hearing Sakonji Urokodaki's voice, Xander 's consciousness returned from the System.
"Grandfather Urokodaki." Xander smiled slightly and stood behind Urokodaki.
Then Sakonji Urokodaki looked at Tanjiro standing next to him.
"I'm Urokodaki Sakonji. You're the one introduced by Tomioka Giyu, correct?"
Hearing Xander address Urokodaki Sakonji, Tanjiro suddenly grew nervous.
"Ah... that's me. My name is Tanjiro Kamado, and this is my sister Nezuko."
Urokodaki Sakonji's tone suddenly became stern:
"Tanjiro, what will you do if your sister starts eating people?"
Tanjiro froze for a moment.
Seeing Tanjiro's expression, Urokodaki Sakonji felt a bit disappointed, but Xander suddenly whispered to himself:
"I will kill her with my own hands, and then commit suicide to apologize."
Hearing Xander's words, Urokodaki was very satisfied.