Ikoku no Prince wa Jimiko wo Mederu.

Aya Tsuchida is a woman in her 30s who has never worn makeup and distrusts other people. Her colleagues at work and passerby give her strange looks, which makes her feel even more self-loathing. Then, a man who looks like a prince from a foreign land appears...!? "I'll turn you from a mole into a butterfly. I'll change your life dramatically!" The man turns out to be a famous, world-renowned makeup artist...!? And from there, Aya's life changes... (Source: Funguild, translated)