✓ Reviewed by Lee An Na — Director, INMOREBEAUTY SEOUL · Last updated: August 2026 · Reading time: 6 min If you've ever pulled your hair back and wished your hairline looked a little fuller or more defined, hairline PMU might be the answer. At INMOREBEAUTY SEOUL, a semi-permanent makeup studio in Gangnam, Seoul, South Korea, Director Lee An Na designs hairline PMU using the same principle she applies to every treatment — including her signature lip blushing work in Seoul — re