Saiyuuki Gaiden

Genjo is a Buddhist priest in the city of Shangri-La, which is being ravaged by yokai spirits that have fallen out of balance with the natural order. His superiors send him on a journey far to the west to discover why this is happening and how to stop it. His companions are three yokai with human souls. But this is no day trip—the four will encounter many discoveries and horrors on the way, and on the road, Genjo will wonder … can he really trust his supernatural companions? (Source: Kodansha USA)

Saiyuki Ibun recounts how a man grew up to become the pivotal character Koumyou, years before the first Saiyuki storyline. (Source: Anime News Network)

From: Project Kurai Ryu Up in Heaven, a new part-timer joins the team under Tenpo and Kenren's care. He gets to see the so-called "ants" from the inside.

Characters/Pairing: Konzen x Goku & implied Kenren x Tenpou.

Pairing: Kenren x Tenpou

Pairing: Tenpou x Konzen Set in the Saiyuki Gaiden storyline. Goku learns a few things from Kanzeon Bosatsu, including a charm to keep the people you love with you forever. Goku dashes off to give Konzen the charm, which turns out to be a kiss. Konzen's startled, to say the least, but Tenpou takes it even worse. Explicit doujinshi in full color! Features a one-page gag story with some Kenren/Goujun hints at the end. (from Zettai Hentai)