Mao manga volume 13 features story and art by Rumiko Takahashi.

One of our friends confesses to setting the Goko clan treasure house on fire centuries ago. But why did they do it? Then, Mao has a revelation about Byoki the cat demon, the gang takes on a corrupt polluting industrialist, and Mei, the guardian of the Garden of Longevity, reveals new facets to her personality. Plus, a mysterious water wielder appears - whose side is he on?