-bad blood-

'If we're only ever looking back we will drive ourselves insane
As the friendship goes resentment grows
We will walk our different ways
But those are the days that bind us together, forever'
                    - Bastille: 'Bad Blood'

Manga/Anime: D.Gray-man
Mangaka: Hoshino, Katsura
Characters: Allen Walker (left); Lavi (right)
Program: Photoshop CS2
Original artist: Seina, Rin (part of idea)