Mianshan Ten Thousand Doors

When everyone wakes up, a door will be closed in Mianshan. But some people's doors are always open. When Ye Zhiwei woke up, he found himself trapped in a mountain with thousands of doors. Every time a door is opened, it is a dream from which one cannot wake up; every time a level is cleared, some people completely forget their past. But no one knows—— Mianshan is not a mountain. Thousands of doors are not doors.