Nan Jinxi died to save Song Jinchen when he was a child. Then Song Jinchen refused to accept that he had hallucinations and could only be treated with medicine. Then Song Jinchen had a dream. There were many people he didn't know and Nan Jinxi in the dream. Together they found a solution to the blood rain and brought Song Jinchen back to their world.
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Yes, it's the be ending (but double death counts as he)
Intention: be