Shall I be charged for storage?

No, you don't need to pay for storage. 

Leyifan provide 30 days free storage for each package. 

If your package put in storage over 30 days, we will charge an extra fee 30 JPY/kg each day started from the 31^st day.
If the total storage time is over 120 days, the package would be considered to be discarded, and we would have the authorization to dispose this package.