Lin Xianning never forgot the bird behind her calling her Sister Yunduo.
Yunwangniao never forgot the piece of sky she failed to capture.
Yun Wangniao, who had known each other since childhood but had no results, was driven mad and sent to a lunatic asylum. After all, he was not rescued. After leaving, Lin Xianning returned to the lunatic asylum again.
Purpose: Promises cannot be broken