From the back cover:
Ginji and Ban are back on the trail of some missing kids and the Divine Design card game that lured them away. When the GetBackers infiltrate the game company’s headquarters, Ban faces off against a powerful foe who’s playing for keeps with a stacked deck! But when a bewitching beauty shows up, will she steal Ginji’s heart?!
The sudden bursts of back story, some foreshadowing from Ginji, and an overall quite different tone than heretofore make this arc feel really unique, but I can’t, at this stage, predict whether it will wind up really lame or really cool. So far so good, but it isn’t difficult to imagine a disappointing conclusion.
That said, there’s a good deal to like in this volume. This whole arc was left out of the anime, and it might turn out that it contains some crucial information that would’ve made that final Infinity Fortress bit in the anime make more sense. The only real complaint I have is regarding the art, and I’m not even talking about mass quantities of boobs. I am tired of seeing the ridges in roofs of mouths. It looks like characters are munching on spiny insects and is very distracting!