Saiyuki 100 Word Challenge

Strangers were hard to come by last week.  No points were awarded.

This week's prompt is #27 - Nostalgia

Nostalgia can be a bittersweet thing.  It is fond longing for something that has past, and yet can the recollection of that something can make you feel a little sad that it isn't that time again.

Is Sanzo feeling a little nostalgic for his master?  Does Hakkai remember better days when the rain won't stop coming down?  Are Gojyo's remembrances trivial little things in his book?  Is there anything Ni would be nostalgic over?  Or does the past hurt override any nostalgic feelings whatsoever?

What could make our characters feel a little nostalgia?  Write it in just 100 words.