So by now, you've heard the new BTS x Halsey colab "Boy With Luv." Looks like Halsey's relationship with the band goes deeper than just being part of a song together. They seem to have developed a real bond, so much so, that she has a secret, yet not-so-secret handshake with RM. So if we learn it, it's almost like we're all best friends... right? Also, there is a lot going on in the background of the video as well, so just take a moment to soak it all in and digest. Then learn the handshake so we can all feel like family.