The song is COMPLETELY acapella, meaning no instruments, slow, and is sung by an Asian female artist. The background vocals sung by her and are a loop from beginning to end. There is a music video in which she is in an empty place, slowly dancing. I heard it around 2015/2016 and can’t remember the title or artist. Please, if you have any idea of what the song might be or if you’ve heard something similar, don’t hesitate to let me know.