The four protagonists in the film show a person's growth process from 4 perspectives :
1. Growth. Hapiness, a company employee, grows up and falls quickly as if being filled with "hormones".
2. To fall in love. Simply put, to escape sin and chaos.
3. Separate. "Survivor's Guilt". Self-mastery.
4. Introspect. "Redemption of Humanity".
The film tells the story of four pure and kind-hearted caterpillars who make their own tombs and emerge from the cocoon in a peculiar and slightly desperate way.
PS: Does breathing gas produce butterfly effect :)
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