A sunny spring day in April. Elderly people were sitting in the park, among the blooming cherry trees, talking and drinking coffees. Group of teenagers would occasionally pass through the park, either by foot, or on skateboards or on bike. It was a lovely day. You could tell people were in a good mood, probably by the good weather. Everyone seemed so nice and friendly, if you nodded in a greeting, you got a nod back without getting weird looks. It was a good day.