Two male protagonists, sour story + reunion after breaking up
"If I die, I will turn into a blue bird and fly on your shoulder."
"At the age of 23, he was forced to break up."
"He was diagnosed with stomach cancer at the age of 25."
"He started keeping a diary at the age of 27."
"At the age of 28, he gave up treatment."
"He passed away at the age of 29."
Concept: The fate of two little bitter gourds