Originally Posted by
Ryllharu
I saw them as tears of happiness, that he went through so much effort to save her from the dreamworld she was lost inside while protecting everyone. In the scene right before she opens her eyes, he says that he's brought her to the promised place, significant only because they said earlier they would use the plane to visit the tower.
She acknowledges that they are about to lose something (a feeling she was unsure of the cause the length of her dream sequence). It should be obvious that they are about to lose the tower as a place they promised to go. She goes on about how she urgently needed to tell him about their dreams and hearts connecting the way they did are an equally special and unique connection, a promised place of their own, forged only by their need to see each other.
I fail to see how Hiroki saying "we may have lost our promised place, but our lives begin now," conveys anything but a positive ending. It correlates directly with Sayuri's speech about losing their place, but knowing they still have something unique together in their hearts.