This is the cleanser I use.

I use the Etude Soonjung Mild Acidic Whip Cleanser! It's famous, so I think a lot of you probably know it. I've been using it since right after it was released, so it must have been several years.

The advantages of this product are that it is mildly acidic to balance the skin's oil and moisture, is free of harmful ingredients, and is convenient because it comes with a foaming dispenser so you can simply pull it out and wash your face immediately without having to rub. It is also affordable; if you buy the main unit the first time and then purchase refills thereafter, you can use 300ml for 15,000 won! Considering that 300ml is a large capacity cleanser, that price is extremely desirable.

If there's a downside... people say the cleaning power is weak, but I just washed it lightly twice, so I can't really tell. Please don't get discontinued!