This is a collection of short stories, and "Marrying the Wrong Flower" is their common theme.
Someone suddenly fell in love with the groom's brother just before they got married...
Some people find out that they are not destined to the bride until the groom gets married...
Someone was about to get married, but still remembered the promise made many years ago, and ran over and asked: "I said back then that if I want to get married, I will tell you. But now, I want to ask, will you marry me?"
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