All the worlds begin with Demon Slayer

 [The Hyper-Dimensional Crossing System is activated]

  [Current world: Demon Slayer World]

  [Starting rewards: 1 Demon Slayer Sword; Demon God Contract is signed, Demon God Devourer is obtained]

  [Demon God Devourer: A person with this ability can nourish the contracted demon god by devouring {demon}, so that the holder can borrow more powerful demon god power from the demon god]

  [Current Demon God Devourer level: F level]

  [Core task released: Help Nezuko become human again (Note: The death of the task target will be regarded as a task failure)]

  [Task completion reward: Get permanent use of the Hyper-Dimensional Crossing System, get 100% of the power of the first dimension wall, and unlock the next dimension world]

  [Task failure penalty: This dimension crossing ends immediately, and the system will humanely deal with the host]

  The dense and fast mechanical sound entered Bai Yu's mind. Before Bai Yu could figure out what was going on, Bai Yu fell into the snow.

  Fortunately, the place where Bai Yu fell was soft snow, otherwise it would be very difficult!

  Bai Yu suddenly turned over and stood up from the snow. He was thinly dressed and suddenly shuddered, and then sneezed.

  "What's going on? Is this heaven? What's the matter with the voice in my mind just now?" Bai Yu looked around and muttered to himself in a daze.

  ——"Demon Slayer World? Is it the alien world where humans and demons coexist and demons eat people? Isn't that an anime?"

  Bai Yu suddenly felt a palpitation. He unexpectedly crossed into the dimension world of anime.

  Anime fan Bai Yu who has watched this anime knows that there is a demon king named Muzan Kibutsuji in this world. This guy has the ability to turn humans into demons. Anyone who is stained with his blood will immediately become a demon who eats people, completely fall into the demon world, and let him command. It's

  really fate. I didn't expect that I would get a new life again.

  Just when Bai Yu was thinking about what was going on, a flash of light suddenly appeared above Bai Yu's head, and a black and purple demon-slaying sword cut through the air and fell down with a burst of broken sound.

  Bai Yu felt the cold on his head, looked up suddenly, and then subconsciously stepped back a few steps. Because Bai Yu was in the thick snow, his focus became unstable while he stepped back, and he ended up sitting on the ground. The

  next moment, the demon-slaying sword was inserted into the snow in front of Bai Yu's crotch, scaring Bai Yu so much that he broke out in a cold sweat.

  Oh my gosh! I almost became a eunuch, Bai Yu sighed inwardly.

  [Current mainline mission released: Stop Tomioka Giyu from killing Nezuko]

  [Penalty for mission failure: This dimension crossing ends immediately, and the system will humanely treat the host]

  [Reward for mission completion: Obtain the Water Breathing Breathing Technique (Mastery)]

  [Introduction to mission-related characters]

  [Tomioka Giyu: One of the nine pillars of the Demon Slayer Corps, the successor of the Water Breathing School, with super strength]

  [Nezuko: An innocent girl who became a demon because of Muzan Kibutsuji's blood]

  As the broadcast of the super-dimensional crossing system came to his mind again, Bai Yu looked at the demon-slaying sword in front of his crotch, and Bai Yu sorted out his thoughts little by little, and then gradually reacted.

  Bai Yu, who had completely reacted, stood up suddenly, and then held the demon-slaying sword in his hand.

  At this time, Bai Yu had noticed that a small map appeared in his field of vision, and there was a countdown time at the bottom of the small map. Time passed second by second, and soon there were only three minutes left.

  Knowing that there was not much time left, Bai Yu cursed in his heart, and no longer thought about it. He solved this time-limited task first.

  Immediately, Bai Yu ran towards the location of this mission according to the map prompts of the super-dimensional crossing system.

  After running for a while, Bai Yu's breathing could not keep up with the rhythm and he was panting very hard.

  Just when Bai Yu was feeling uncomfortable, dark purple patterns similar to tattoos began to appear on his body. The most obvious change was in Bai Yu's right hand holding the demon-slaying sword.