I recommend Patheon Noscarinane Trouble Serum.

The product I recommend is Patheon Noscarine Trouble Serum. Since it has completed sensitivity skin irritation tests, even I, with my extremely sensitive skin, have been using it consistently without any breakouts. I really struggled with acne from my school days until a few months ago, but now, except for scars, most of it has subsided! This product contains Dong-A Pharmaceutical's patented Heparin Complex and Cica ingredients, which are said to strengthen the skin barrier. The ampoule contains 50ml and is priced in the 20,000 won range. The advantage is that it comes in a dropper type, allowing you to control the amount you use. Also, it is moisturizing enough that even I, with my extremely dry skin, have no issues using it, so it helps with both acne relief and hydration. While results may vary from person to person, I recommend it because I saw significant results in calming my acne!