Under the Skin

This contains two short stories, one about Bun and a new kid he's found to replace Satoru from Heat; the second is a look at Bun and Daisuke Miyamoto Kano's "Walker" universe timeline: 1) 2) -- -- -- -- 3) -- Under the Skin -- The ones on ( -- ) are doujinshis. They give background or "add into" to some key points in the main story line. So you're not really missing anything even if you don't read it.