Petals and Fallen Leaves

In this lively alley lived two innocent and lively children, one named Shang Yifei and the other named Shang Yunyi. They met in elementary school. They were noisy as soon as they met. By the first grade of junior high school, this phenomenon seemed to be gradually disappearing; , their faces lost their original smiles, and the naive Shang Yifei discovered that when Shang Yunyi wanted to break up with him, he fell in love with the girl who once brought him happiness, from the original "sister" to the current "sibling" relationship. Maybe they should have their own happiness...