… for one to die immediately by getting hit by a car

I saw this movie a few years ago, perhaps 2013 and I think it was older than that, on a recommendation for a unique, spiritual romance. Soulmates/Twinflames/Reincarnation theme. In color. The film was Asian, not sure if subtitled or not. Set in mountains. A couple falls in love and seeks to be together forever. The woman encourages the man to steal a power he was not supposed to. There is a scene where the couple is levitating/floating in the air while kissing/lovemaking. This scene stands out in my mind because it was beautifully done, the backdrop of mountains and perhaps the woman had on a flowy dress at some point, they are so absorbed in each other they may not realize/care they are floating in the air. Their immortal plan backfires, not sure of details, but one or maybe both ends up dying. They find each other a long time later, maybe hundreds of years later. It’s the end of the movie. As soon as they remember each other, one gets hit by a car.