Brand from Japan: Skin Operation. Skin Operation Mask 25 is a sheet mask for acne prevention and acne scar care.Containing 2K glycyrrhizic acid & tocopherol acetate (active ingredient), this quasi-drug sheet mask can be used to prevent acne and rough skin.How to use:After cleansing the face carefully, apply toner to prepare the skin.Take out the mask and unfold it, first aligning the eyes, then the mouth, and then adhere it to the entire face.Leave it on for 5 to 15 minutes, then peel off the mask. When removing the mask, hold the protrusion at the temple and slowly peel it off.If any liquid remains on the face, soak it up with the palm of your hand.