It's not the emotion of youth. Everyone is in their own siege, either full of joy, or full of tears, or warm and moved, or showing off happiness, thinking that they are determined to do it despite knowing that it cannot be done, thinking that overcoming difficulties and overcoming the doubts in front of them, they can be happy forever. In the end, they find that it is all a self-deception and trap, and the tyranny, pain, despair, and torture of human nature destroy everything in an instant.
Concept: youth, love, growth