It's almost midnight.
Brand couldn't help but recall that strategy guide, which mentioned that after the plot entered 'Extermination of Lizardman Thieves', the enemy would launch their first action one midnight; the enemy referred to would naturally be the Tree Shepherds, or the 'Paper Card' mercenary group visible on the surface—
'...The sudden attack came fiercely, it could be said that every one of us was stunned by it. The attack started from the northern hill, but anyone running southwards was likely to be hit once; because the main force of the monsters (Tree Shepherds) was evidently in the south. Well, this at least indicates that the advanced artificial intelligence promised by Torrential rain is not just a paper gimmick...'
