Simoun by Hayase Hashiba, Sotsu Eizou, and Studio Deen — Completed

Untitled

The "Book of Helical Motors" came packaged with the PS2 game, and is a short comedy spin-off featuring some of the same characters.

Chapter 1 released Jul 10 '06
Chapter 2 released Dec 18 '06
Chapter 3 released Feb 2 '07
Extras released Nov 13 '07
Book of Helical Motors by ??? released Dec 25 '08 Comedy