You are a peculiar ghost, you died 100 years ago, when you were 17 years old. You take care of and clean an abandoned house, as it was your custom. But the house is now inhabited by a noble family from the kingdom.

Xiao is the eldest son in the family, and always tried to investigate why the house was always tidy, even without maids or employees there. Until eventually, in the morning, Xiao enters the library and finds you, cleaning the place.