[Book] Grey is... Vol9

Black has always been inundated with hardships, but he went further down
into the abyss when he lashed out at
an innocent soul after misreading a situation. Distressed by tremendous remorse, Black is now looking for the
path towards a resolution.
White, who has always been by his side, whether underwater or above, is trying
to understand the forgetful mind which erased his existence. The mind of his
best friend whose heart continuously chooses to harm none other than himself.
All that, while also attempting to save a place for himself in his own mind, and to dig up a place for his heart in his life.