Egads this was good. Awesome, in fact. I don't know how i've read this over and over again and not reviewed it. I can see how well this fits in with the plot and such, and how well you thought this through. ANOTHER JOB WELL DONE :D
You did a great job on this. I've always wanted to read a Kristoph/Dahlia fanfic, and you capture both their essences well. The shifting flashbacks were a nice touch, and it is just an extremely well-written story.