Looking for the twin moons

The main character is called Ye Ying. After her death, she somehow arrived in the new world. The leader of the Grim Reaper asked her to help change the fate of Full Moon. Since the boss couldn’t go back on his word, she had to ask Ye Ying to help her do this. Then, Ye Ying was reborn as Full Moon’s twin sister. Her name was New Moon. After the 52nd ending of the story, I will continue to write. I won’t stop updating, but it will be very slow.