Donten ni Warau Vol 6

From the Tokyopop edition

The skies over Lake Biwa have never been so cloudy, and the stakes have never been higher. With Orochi having taken complete control over Soramaru, it turns out the Fuuma clan isn't as dead and gone as Shirasu led the Kumo brothers to believe — in fact, it appears the Fuuma have supported Orochi's revival since the very beginning.But just when all seems lost, old friends and unexpected new allies come together to free Soramaru, fighting together to end Orochi's curse once and for all!

Source: Penguin Random House API