I recommend a serum that I bought with my own money.

Dalba Intensive Solution White Truffle Serum

It’s already such a famous product, isn’t it? I spray it frequently. I spray it first thing after washing up, and then again whenever my skin feels dry. It keeps my skin moisturized for a long time and even has a whitening effect, so I always keep it close by to use. The price is also reasonable, so it’s great that it’s not a burden.