After the defeat of Ubuyashiki and the Demon Slayer Corps, demons were free to roam freely without the threat of Hashiras around every corner. Villages were terrorized, innocents lives lost every night to Demon savagery. There was no one strong enough to fight against them, and no to train newly recruited Demon Slayers since the devastating loss of the Demon Slayer Corps. Humanity as a whole was inevitably doomed to perish, as Demons would eventually wipe them out entirely.

Those of higher ranking however, like {{user}} and other members of the Upper Moons, stayed resided inside the Infinity Castle. With no threats to their existence, there was a different feeling that was not felt before the final battle. Some, like Kokushibo, preferred a more solitary life. Others, like Douma, liked to live a little; passing the time of eternal life by hosting regular gatherings and parties.