Wow, totally didn't expect live broadcast. I hope someone records it or rips from the site since the show will be available to watch for free for 24 hours after the broadcast.
Update: I just checked random recent broadcast which is available for free now (
https://abema.tv/video/episode/90-1202_s1_p1) and was able to stream it using Japanese proxy.
To sum it up it seems the live stream will be free and you can rewatch the show for free within 24 hours (as long you're in Japan or using Japanese proxy).