Five-year-old Song Wenzhou's biggest worry in life is that "Sister Lin fell from the sky." The younger brother who we agreed to play football with at first turned into a wrinkled little crybaby, and the whole world suddenly became unlovable! Until he climbed over the fence and stared at the quiet and easy-to-deceive Su Wanmei from next door - stuffing her with sour green plums and telling her that she was "not sour at all", but clumsily handed her a handkerchief when she burst into tears.
From then on, the sourness and sourness first met under the old plum tree, quietly brewing the sweetness year after year. He climbed a tree to pick plums, and she handed him jasmine; he played football and got into trouble, but she whispered his lies; he thought his sister was noisy, but she comforted him gently. Two small courtyards and one green plum tree record the clumsiness and sincerity of all the childhood sweethearts.
Time flies like a stream, they noisy and grow up together. Until one day, Song Wenzhou suddenly discovered that the little one he had teased had already quietly lived in his heart...
This is a heart-pounding story about "sour green plums → sweet plums → I will be you for the rest of my life". Watch how the steely straight man gets the idea and dotes on the "cheating sister" next door to become the only one in his heart.
The idea: a pure friendship that spans childhood and adolescence, and the process of how individuals grow together with intimate relationships and learn to understand, give, accept and cherish as time goes by.