They had left all the zombies on one of the topmost floors of the entire school building. They successfully got past the big horde of zombies and reached the ground floor.
They split up into two groups to execute the next part of the plan.
Toshi, Sumi and Ryuga were on the left side.
Raiden and Kingslayer were on the right side.
In front of them was a pile of corpses that fell from the topmost floor. It stank on the ground floor but they had to bear with it.
They started making their way ahead by going over the pile of dead zombies. They didn't want to go over the dead bodies but the corpses were spread all over the ground so they didn't have much space to pass by.
Slowly, they kept on moving ahead.
While they were moving, they only had one fear: what if zombies started falling all over them from the topmost floor?
They were just in the right place for all the zombies to fall right on top of them.