After venturing to the lunar surface and acquiring
a Magatama powerful enough to protect them from the Misama our heroes press on deeper into the Oushuu Highway.

Hiding within the toxic depths of the highway is a Kamikui whose
might was but partially awoken in the battles of Edo....

Satan.

His form is beginning to change, and the Youkai of
the Highway's forests and caves grow restless...

What is the source of the malevolent echo throughout the highway...?

Can the insanity of a Tyrant King be opposed?

The answers await... In Oushuu: Terminus