A set of niacinamide and vitamin C serums, each 30ml. Brand new, unopened. Purchased around November 2025. The combined sale price on Amazon as of January 7th was approximately 3600 yen. The regular price is around 5000 yen. Price negotiations are not accepted in the comments section. Please use the "Price Reduction Request" button in the lower right corner of the product image. We will respond if possible. If we are unable to accommodate your request, we will gradually lower the price, so please "like" the item and check back regularly. If you have any questions about the product, please feel free to ask in the comments section.