"Something is wrong with the forest."
"Indeed."
Mylene and Claire could sense that something was happening in the Great Forest of Darkness. The time was night, the time when many monsters became active and aggressive but the forest was silent.
Baffled by the strangeness, Mylene and Claire roamed around the vast forest to investigate. In the end, they found an indefinite amount of monsters marching uniformly in the depths of the forest.
"What on earth is happening in the forest?"
"I don't know. But the monsters are behaving like they are following the instructions of someone."
"It seems like that."
Later on, the army of monsters split into two and formed two fronts. One is heading southwest, while the other is heading northwest.
Dozens of thousands of different sorts of monsters are marching their way to the kingdoms of Astley and Boulder.