Hello from Regensburg, Bavaria! This sign belongs to city with UNESCO world heritage site status for its medieval town centre, a definite must see that's for sure!
"If your ad were here, we wouldn't need to fill in for you again..." An ad for the Konditorei Opera.
This translation was very tricky (must be because it's philosophical) but this one from the LEO forums seemed to hit the nail on the head: "Everything that is real in life is an encounter."
Love the custom envelope! I don't know which manga it's from all that I know it's by CLAMP