The protagonist is an unemployed young man who cannot find a job. He has no choice but to inherit the small pawnshop left by his grandfather, which is about to close down. Unexpectedly, this small pawnshop actually hides a hidden door of time, but only he can enter this door of time. When he enters, the object he holds in his hand will be transported to the era when the object was made. At this point, the protagonist begins his fantasy journey through ancient and modern times.
