If it were a world of reverse survival, if they were the ones who survived...
When Tomioka Giyuu mistakenly entered the world due to a strange vampire technique, Toyoko Tomioka, one of the two water pillars, covered her face and cried bitterly when she saw him, and Qiu Usagi also had red eyes.
Tomioka Yoshiyuki survived that night with his sister, but was killed by a hand ghost in Fujisei Mountain, protecting Qio Usagi.
Butterfly Ninja was killed by Tong Mo three years ago when he joined hands with his sister to fight against the Second Shangxian.
The Wind Pillar Immortal Kawa Saneya died when he was killed by his friend Konno Kuangikan. His best friend has been helping him take care of Immortal Kawa Genya.
The child of Naruhashizu and Kotonoha was eaten in front of her face by Tongmo who deliberately wanted to tease her in the fifteenth year. After breaking down, she ran away desperately and learned breathing techniques to join the Demon Slayer Corps.
Nezuko Kamado joins the Demon Slayer Squad and fights alongside her younger brother Tanjiro Kamado who turned into a demon.
……
Tomioka Giyu:...? !
Concept: A world where everyone is reunited