Eren was momentarily stunned. He had a lot of questions he wanted to ask the man, but an overwhelming sense of sleepiness suddenly overcame him.
His eyelids grew heavy, and he found it increasingly difficult to maintain his focus. It was as if an unseen force was pulling him into a deep slumber.
"It is going to be painful. So you better sleep for now," the man said, his voice fading into the distance.
Eren's eyes slowly closed, and the world around him descended into complete silence as he fell asleep.
....
"'Wait, I have something to ask!' Eren suddenly exclaimed as he came to his senses.
Reaching out his hand, he sat up. Unfortunately, he was only able to catch thin air and nothing else.
Opening his eyes, he found himself in a completely different place. The barren world was nowhere to be seen. Instead, he was inside the room where he remembered sleeping initially.