This is a medicated beauty serum from Otsuka Pharmaceutical. Use 3-4 pumps of it first thing in the morning and evening after washing your face. After that, you can use your regular lotion. This is a set of 3 bottles. Purchased in 2024, so it's a bit discounted. There are no issues with use. It will be shipped via Takkyubin Compact. Thank you very much.