1. Shangguan Yueming is a twin, and may have special feelings for Asayue.
2. There is no special relationship between Shangguan and Yun, but because Shangguan respects and takes care of her, she also has special concern and care for Yun.
After Shangguan decided to marry an angel, he may have some complicated feelings for Yun, so he will pay more attention to and pester her.
Generally speaking, Shangguan Yueming's obsession with Yun Qianyue may be driven by complex emotions and psychology, which makes her have special interest and concern for Yun Qianyue.