The story begins in the summer, when Song Yan and Lu Yi meet. It's just a smile that has been hidden in Lu Yi's heart for ten years.
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The story finally ends on a rainy day. Lu Yi bids farewell in the rain, bids farewell to his youth and bids farewell to his ten years.
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When I was young, I met someone so amazing that I couldn't forget it for a long time.
Purpose: Make up for the regretful decade