Several years later, Saki, now 26 years old, is working in the "Department of Mutant Management". She is visited at work by Satoru, bringing news of an unprovoked attack among the Monster Rats, whose colonies are now divided into two large alliances. Kiroumaru and Yakomaru, the leaders of the opposing alliances, are summoned to be questioned about the incident, but with both leaders exchanging accusations, no conclusion is reached and some time later, the conflict between both parties escalates into a war. In the first battle, Kiroumaru's Giant Hornet army defeats their opponents, which for some reason did not include members of the main enemy colony, the Robber Flies, led by Yakomaru. Some time later, Saki is visited by Satoru again who informs her that the Giant Hornets were annihilated.