Yes, he should have realized it long ago. If it had not been Uchiha Itachi, the one with the Sharingan, who released the Nine-Tails, then it must have been someone else with the Sharingan who had unleashed this vicious beast.
Other than Yuuhi Kurenai, there was likely no one else.
But he was so sleepy. This was Genjutsu meant to deal with the Nine-Tails; naturally, it worked exceptionally well on an ordinary human like him.
Some of the Anbu present had already collapsed asleep on the ground. Tenzo was the only one stubbornly holding on. With Wood Release, he possessed a natural resistance to external chakra, but before long, he too slowly fell asleep. Yuuhi Kurenai had poured even more chakra into him...
Yet one person was completely unaffected: Might Guy.
The immense pain inflicted by the Eight Gates Released Formation, along with the chakra it unleashed, made it nearly impossible for him to be affected by any Genjutsu.
But he did not choose to attack Yuuhi Kurenai. Instead, he turned his head and waited for the Third Hokage's orders.
"Hit me!" Hiruzen Sarutobi said in a low voice.
What he needed now was to subdue Yuuhi Kurenai immediately. But before that, he could not collapse himself. He needed pain to ease the drowsiness brought on by the Genjutsu.
The instant he closed his eyes, Might Guy's palm was already right before him, smashing viciously into his face.
Although they were doing something utterly rebellious, the Third Hokage had not the slightest intention of killing anyone. He began to hesitate, to think, and even Might Guy grew anxious.
Yet his expression remained as calm as ever. Like an elderly man who had learned to remain unruffled no matter what he faced, he reached out and lightly gripped the staff Enma