Summary refers to the Ohzora Shuppan re-print, 2008:

1. *Not/Love *
   Daisuke is a 29-year-old private detective with a shady past. Bun is an 18-year-old prostitute with a bleak future. Bun offers to help Daisuke with his investigation, but in return he demands to live at Daisuke's. During his stay, Bun becomes a substitute lover and sleeps with Daisuke in order to alleviate their loneliness. But how long can a relationship last when they're both insisting that it's not love?

2. Everyday Life 7 Years Later

3. Lotta Lovin'

4. Body

5. The Blue Cowl
   6-7) Obsession

6. Missing

7. Slave to the Hormone

Miyamoto Kano's "Walker" universe timeline:

1. Are You Enemy?
2. Not/Love
   -- Not/Love dj - The Reason Why We Live Together
   -- Not/Love dj - Dog Days
   -- Not/Love dj - Demonic Conversations
   -- Not/Love dj - Brand New Lover
3. Heat (MIYAMOTO Kano)
   -- Under the Skin
   -- Lizards, Angels, and Daemons

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.