before ambei decides to head off, he realizes that beatsy isn't going anywhere without a rap battle. but his cyan pal here doesn't have a microphone... looks like it won't be a battle anyways. after all, his microphone is part of his resilience to attacks when singing. without it, he's practically defenseless.
like i said, this'll be how beatsy's side of the story will be displayed. yes, he'll still take part in the main storyline, but any events HE gets into will be a part of this series' cross unity arc. this is Act 0, just the starting point.