Somewhere in an underground city plunged in darkness awoke a boy with blurry memories of a past life he couldn't remember and strange marks on his back.
"To whoever trapped us here, we are no better than animals."
…

Where Shin one day wakes up in the world he wrote with, as his only weapon, a strange ability that permits him to play with the threads of fate.

(A/N: adding the #bromance manually because scribblehub doesn't have it.)