In the case that you return to the real world with Garry, if you have Ib give him her handkerchief, you receive this ending.
Having returned to the real world, Ib loses all her memories of the other museum, and wanders around the art museum by herself.
She finds an unfamiliar man standing by the statue of the rose, is intrigued by him for some reason, and talks to him.
The two of them should be complete strangers.
But he knows her name... and in his pocket...!!
It is one of the most difficult endings to get, but is treated by the fans as the true ending.