The title of the manga is "Genesis: Vol. Sonsaku Physalis, Shuuyu Hyaku Shiki". The story will shift from Ryubi to these two warriors from the Kingdom of Gou I believe.
October 26th release, 1,365 Yen (inclusive of tax).
Quite scandalous actually. ^^; As you can see that the design of Lu Su is basically a recolored Shuuyu Hyaku Shiki with a different head design. Lu Su is originally Rick Dias in the first manga.
Image is from ToyWorld Forum.