It's been awhile since I read this part in the novel, so the details may not be accurate, and stuff could be changed for the comic anyway.
The Japanese team led by Goto Ryuji gets annihilated by Beru, the black humanoid ant that hatched this chapter.
The Korean team kill the Ant Queen. Beru shows up, the S-rank healer gets decapitated, Cha Hea In gets hurt to the point that she almost dies, and the rest of the guys are on the verge of being overtaken when Jin Woo shows up.
Jin Woo and Beru have an awesome fight, Beru loses. Jin Woo uses the dead healer's shadow long enough for him to heal Cha Hea In, then releases him. Beru ends up being a General class or something like that and is Jin Woo's strongest shadow minion/follower thing.
B the way, Beru can speak, and he learns stuff from the people he eats.