I really like that the backstory is told in the way he would in-story; that his dialogue is terse and shows how he feels about the whole ordeal, rather than just him giving a summary of events with images. It feels quite natural, snappy, while making his regret feel convincing :D
Pretty solid, some good facial expressions and such going on. The all black and white approach isn't mixing great with the handwritten dialogue though - it does kind of bleed together and make it awkward to try and read. Might bare trying to use thicker outlines for the dialogue so that it stands out better.