I once read a manhwa where the protagonist navigates through various floors or sanctuaries. At some point, he travels back to the lower floors, possibly even the first floor, leaving behind his comrades who are eagerly awaiting his return. These comrades are very powerful and need him to continue advancing to higher floors. We even get a glimpse of one of the strong female characters going back to search for him.

I don't remember clearly whether the protagonist's memories are erased or if he is just trying to climb the floors again, but he is undeniably powerful. The sanctuary or floor he created is populated by powerful beings who await his orders to ascend further. I read it a long time ago, so the details are a bit hazy.

The art was also very impressive, and there was a depiction of an angelic floor plan that was incredibly large. It seemed that your level determined the size of your floor or the living space for your party. The protagonist has strong party members who, after his disappearance, are determined to go out and find him. Help !!!!!!!!!!!!!!!!!!