My Soul Turned into a Ghost, You Want Me to Save People?

[Single female protagonist + sweet pet + time travel + micro terror + relaxation + urban + weird] Woman: Why is your body so cold? Man: Because I was born at night! The protagonist travels to a ghost and activates the system at the same time. The system's name is "Rescue System". Only after saving a thousand people can he transform into a human form, and he can transform into a man or a woman. What? Ghost saves people? How about playing? However, the system has painted a huge pie for the protagonist... Wonderful story, From here...