Expect to feel AMAZING! You lucky lady, I am so jealous!

It depends where you are going, if it's just a shopping mall Asian massage place, they'll just use some thin material over your clothes and rub front and back excluding bum & chest.

But if it's a real massage at a day spa, they'll generally ask you to leave only your underwear on, but will cover the parts they aren't working on with a towel and will ask you if you would like your chest touched.