Beware the Hydrangea - NaeGami - [Hiatus]

One day, after he finished a mission given to him and the other survivors by the Future Foundation, Byakuya starts feeling ill. Suddenly, he starts coughing violently and looks to see a mixture of blood and flower petals in his hands. He identifies them as Hydrangeas but is baffled by their mysterious color, black fading into green at the petal's tips. They remind him of something Makoto told him a while back...his favorite flower...his favorite colors...crap. He read up on this rare disease after Makoto mentioned it in passing but he never thought it was real. He hopes the meaning behind it will keep him alive.

"Can you imagine how beautiful a black and green Hydrangea would be, Byakuya?"
'I certainly can,' he thought as he forced a pained smile at the bloody flower petals that rested in his hands.

Will the flower's symbolism be his salvation? Or was it nothing but an empty promise?

This is a Hanahaki NaeGami fanfic where Byakuya falls in love with Makoto without even realizing it. Then one day, he starts coughing up bloody flowers that are strikingly similar to something Makoto mentioned in the past. His favorite flower, the Hydrangea, doesn't grow in his favorite colors, so he made a fictional species that does and created a meaning for it.
So of course, when Byakuya contracts this mysterious illness, he starts vomiting his love interest's own creation. He believes the sight of it is grotesquely beautiful.

All chapters (including the prologue) are over 1,000 words long.

{DISCLAIMER: NONE OF THE ART USED IN THIS STORY IS MINE. ALL CREDIT TO ORIGINAL ARTISTS}.