No look closer.
It's a Nonya Kebaya top! I have them!
The good thing about being in Asia [specifically Singapore and Malaysia] is that they are easy to find and quite affordable.
The bad thing would be that you have to wear them in a way that it comes off as street style or else you'd look like you're trying too hard.
And wearing this effortless street-style is mucho difficult. If anyone has any idea, be my guest.