A Door Narrowly Opened

The door is open, same with the window.
Unlike others, they are too narrow.
It’s hard for a three or two to enter.
Ergo, like thieves they flew.
The owner offers all.
From tip to toe, just tell by naming all.
Satisfying, that’s what inside.
Interestingly, no one dared to enter.
No one dare to die.
A lesson it might tell,
It’s not bad to prepare.
Entering is never too late.
Even though it’s haunted, it’s worth the wait.
The door will soon close.
The window would follow if it chose.
However, if the keys are yours,
There’s nothing to worry,
Let time take its course.