Soul Attracting Button: Starfall and Forgotten River

She is a "soul-attracting grass" that grows on the banks of the Netherworld River. She is born with no roots and knows neither warmth nor cold. He was the most arrogant Lord of Stars in the Nine Heavens. When he fell into the mortal world, he was saved by her and became the most useless "medicine guide" in her eyes. Five hundred years later, she broke into the Star Palace to save her master, only to find that the aloof Star Lord was looking at the "Star Button" on her chest that was made by his own hands with a look of hatred but love. "Everything in this world has a cause and effect. When do you plan to repay the heart you owe me?"