I'm sorry if this comes off rude, but I'm getting annoyed at plastic surgery comments. People need to use their heads before posting about it. Just my take.
Any form of plastic surgery takes weeks and in this case MONTHS to heal. We've never seen Ayu's nose bandaged up or anything this past year. It's probably just make up, you can contour different parts of your face and make them appear thinner and different than what they are. :/