Rats Ykcul. It would be a slice of life about rats, and their daily struggles of living in a contaminated, infectious environment. Gar will abound, with rats fighting it out for control over the sewer system.
The series would be an ongoing metaphor about human life, and how it so often is dark and miserable, even if the world appears to be a beautifull place. Artistically, it will deviate from regular kawaii moeblob style, relying on the aesthetics of ugly, disgusting environments to convey an unprecedented atmosphere.
It would be fucking awesome.