Where Did the Flowers Fall?

In a village with beautiful mountains and clear waters, there are hundreds of families living. Although their lives are poor and simple, their friendship with each other is more important than the mountains and deeper than the water. They grew up together. They were admitted to junior high school together and high school together. However, after graduating from high school, they each faced different fates. After a few years of changes, did they keep the purity of their relationship like they did at the beginning, or have they become adulterated and unchangeable. In the end, under the transformation of this world, what kind of path did they take?