"My baby brother." A Rui + OC fic (NOT A SHIP!)

"It'll be alright now... I promise, Rui."

When Rui Ayaki was 11, his world was turned upside down. Left alone, scared, and traumatized, he doesn't know what he'd do.

And then, Shieka came. She found him and took him under her wing as her brother, her precious little brother who she would do anything for...

...until he became a demon, that is.