Seira realizes Regis is in danger and rushes to help him. Raizel and Frankenstein suspect that Tashiro and Kase might be in trouble as well, so they follow Seira. M-21 comes up with a plan to sacrifice himself to save all of them, and Regis confronts the danger by his side. The battle against DA-5 has begun! But they're up against the Union's state-of-the-art special forces team, an opponent that won't go down easily...