Just after the second division battle ends, a string of ordinary citizens go on the rampage. On top of that, there's a hostage situation at a hotel in Ikebukuro. The objective: revenge against the Buster Bros!!! Ichiro, Jiro, and Saburo dash to the scene!

Samatoki recognizes TBH's dancers. Bad things will happen if they aren't stopped, so MAD TRIGGER CREW joins forces with Ichiro Yamada, Ramuda Amemura, and Jakurai Jinguji. Elsewhere, bad things are happening around Nagoya Division's Bad Ass Temple.

A huge man named Ondoriya challenges Sasara Nurude, Rosho Tsutsujimori, and Rei Amayado—Osaka Division's Dotsuitare Honpo—to a rap battle. An accident during the battle causes Ondoriya to lose his memory. Sasara and Rosho try to help him get it back!

The six leaders head to the former site of Beginning Gate where they find Kaibyakumon waiting for them. Kaibyakumon transforms into a monster using hundreds of drones and overwhelms the six leaders with a rap overflowing with rage and despair.