Although we have a thorough inspection system for manufacturing and delivering our products, in very rare cases, products are damaged during transportation or sets are incomplete. In the case that you discover a malfunction or defect or that sets are incomplete after purchasing the product from an official store and before using it, as a general rule we will repair or exchange the product at the company’s expense as an initial defect when the problem is reported within one (1) month from the date of purchase. In addition, as a general rule the company will bear any delivery costs that are incurred in such cases.