the last boy above ground : a graphic novel by rodrigo reyes rico
After a world-changing pollution wave sends people below ground, Elias is the only human still hanging around Mexico City.
That is, until he meets Ana. As the two collide, Ana gets an up-close look at the city’s mutated creatures, and Elias will discover the secret of how he can breathe above ground while others require special suits.
The kids will need each other—and maybe even some strange creatures—to discover if a better world is possible. But first, they’ll have to avoid the clutches of the fearsome Rat King, who’s dead set on taking them both prisoner.