Journey: Reunion (KNY/demon slayer AU)

Prologue

This story takes place between two worlds, one of struggle and despair and the other of that once was at constant war is finally over. A story that has changed the lives of many and even "him". Of course, let's not rush things and instead, let me tell you how a boy from the lost realm finished his previous adventure in a world filled with cookies…

Journey/Y/N: "It's over Dark Enchantress Cookie, everyone in the world is against you. You cannot win in a battle that has already been lost!"

Dark Enchantress: "So you think Y/N? Or does your real name, Journey sound better? It doesn't matter really since I've been saving this spell for last!"

Journey/Y/N: "Huh!?"

Dark Enchantress seemed to be concentrating energy on her staff.

Dark Enchantress: "Doesn't this look familiar young foreign cookie!?"

She unleashed a powerful attack similar to a final fury. It was just waves and waves of pain until Journey collapsed as he was losing amounts of the odd looking blood that was a golden color instead of Strawberry jam…

Then the unexpected happened…

Journey lifts from the ground floating and tapped into the power of Aether when he was subjected to the trauma, then he heard a voice, two voices to be exact.

???: "Now it is time to unleash the true Aetherian within you…"

His Aether Fury opens a portal to another dimension, allowing Journey to summon multiple copies of himself each wielding a monado, with a symbol of their own, attacking with no sign of stopping. Instead of finishing off Dark Enchantress, the Aether Fury was used to purify and thus White Lily Cookie returned once more. Finally, what seemed like an endless war is finally over forever.

What once was a world of fallen crumbs is now a world where the cookies take a more humanoid form. The fear of being eaten by the witches is gone forever, light and peace has returned to the world thanks to everyone's efforts, even the once amnesiac child, became a knight on his new home, the isle of awakening

-Somewhere else…-

Someone felt a disturbance within the Aether, it was oddly familiar until he realized.

???: "Hey, did you feel that?"

???: "What is it?

???: "It's our son, he is still alive somewhere."

???: "Then we should go look for him! I want to see his beautiful blue eyes and yellow hair again. We haven't seen him since before his teen years."

???: "Oh? It seems like I can barely hear him, the end of the conversation is interesting. Do you want to know what he said?"

???: "What did he say?"

???: *Repeats what Journey said* "One day, I hope I can meet them all, the people in this boundless universe. As long as we stick together, we will face our future together."

???: "Will he find us? I really hope so! But perhaps we should look for him in case he does stumble in this world, it's dangerous with the demons lurking about at night."

???: "I'll be staying here in this village, this place has been hidden since the day we established it. I will not be joining you in case those monsters dev-"

*He sensed something, more like saw a vision, he grabbed his sword and shield.*

???: "Where are you heading off to?"

???: "To prevent a cruel fate from happening, join me, this is gonna be a tough trip…"

(Timeskip, 2 years earlier…)
Tanjiro POV, morning hours