Ropponmatsu returns, but Iwata is furious to discover that the new Ropponmatsu, Unit 2, is in the shape of a young, annoying and mentally irritating cat-girl. Following in her predecessor Unit's footsteps, Ropponmatsu Unit 2 engages Ilpalazzo's newest bomb-delivery system, a mobile bomb, the T-10000 - in reality Excel disguised as a large panda bear to avoid attention and suspicion. Things look bad for little Unit 2, but fortunately Ropponmatsu Unit 1 returns in the nick of time.