The kid was happy with his friends, learning and studying together, not worrying about the future. Now he's graduated and one by one the friends had gone with their lives, leaving the kid alone, as he was before he met them.
He struggles to cope with trusting people, and he doesn't know how to be a good friend, because everybody ended up leaving him alone in the end. This is the story of how the kid cope with rapid changes in his life beyond graduation, the story of moving on.