
Chapter 79, 80 and 81 is a crossover story between G-Defend and Jinjuu houretsuden.

I'm not quite used to using this spoiler thingy....so I beg for forgiveness to anyone, if this doesn't work as intended in the first try...
.*spoiler ahead*
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one of those guys is Alex - remember the aforementioned 3 new members from L.A.? They're former colleagues and Alex (and here we notice how much sensei's artwork changed in the course of this series) we already know from the humanoid-arc and the L.A.-Arc when Iwase got his amnesia
who were the three guys at the end of ch81??? Xianglin? Lifang & Tuoren?
???