Unknown Factory

"Hell Processing Factory" Your father suddenly collapsed on the street in front of you and disappeared without a trace, leaving only a mysterious black square. Your mother died of illness when you were ten years old. But in the depths of this hell, you saw her figure - she smiled at him in the stream of light, spoke softly at the end of memory, and walked towards deeper darkness in every cycle. "No matter how many times, I will wait for you." They told him: This is not your first time here. This is the fifth cycle. In the first four times, you died three times and disappeared once. Every time, you forget something. Every time, you get closer to the truth. This time, you have to "do" rather than "find." --- There are seven levels in this hell. The first level: the human world. Second floor: entrance floor. The third floor: assembly line area. The fourth level: Forgotten area. The fifth layer: core. The sixth floor: restricted area. Level 7: Below. What's below?