A question about the magical fate of playing cards, two hearts tied together.

The judgment upstairs is right. It should be procrastination. He prepared two identical cards in advance. Let the girl sign her name and draw a heart on a piece of paper.

If you don't have to drag, the trick of magic is that there is something wrong with the water written by the magician, which can make the words disappear. He drew a heart on paper with invisible ink in advance, and then hinted that the girl was near a specific position when she drew the heart. So when the magician's invisible ink is displayed, two hearts are together. The water in the pen used by the magician at the scene can disappear, so that the separated hearts he drew can disappear, leaving only two hearts together. But it's too much trouble, so it's a big drag