In the future, cockroaches have evolved into intelligent creatures much like humans. Humans, however, still view them as disgusting vermin, and they exist on the outskirts of society, feeding on garbage and rarely venturing into inhabited areas. One night, a young girl named Yui has a run-in with a cockroach named Dai, and she learns that they aren't exactly the vermin she believed they were...

(Source: MU)