If any damage is caused to the leased thing after the lessee receives it (excluding any wear of the leased thing caused by the ordinary manner of using and making profit from it and any aging degradation of the leased thing; the same applies in this Article below), the lessee has an obligation to restore the damaged thing when the lease is terminated; provided, however, that this does not apply if the damage is caused due to any grounds not attributable to the lessee.