It's just so empty.. only with the characters who have the same emptiness in their hearts, and that emptiness is eager to get itself vanished, forcing the character to make contacts with the nature and think deeply about life in their longtime.. that void in their heart allows them to meet someone new, in hope of letting itself get filled , it tries, sometimes it fails.. sometimes it fills... that void strives to gather the melodies of life into itself. So basically these writings are about the emptiness which decides actions.