The Death Stench Device is the 11th Chapter of Gyo.
After, Tadashi saw the death stench kaori, He was shocked. Koyanagi arrived and explains everything. It was revealed that he invented the walking stench machine.
While Koyanagi turns the machine on,He was accidentally stab by a sharp legs of the machine. Kaori runs away from them.
Now, It's time to find Kaori. However, The City is destroyed and being invaded by the death stenches.