Tabi ni Deyou, Horobiyuku Sekai no Hate made

Tabi ni Deyou, Horobiyuku Sekai no Hate made (旅に出よう、滅びゆく世界の果てまで, lit. "Our Journey to the End of the Ceasing World") is a light novel series by Tadahito Yorozuya with illustrations by Houmitsu.

Plot
The story revolves around a boy and a girl who travel together through a world that is gradually nearing its end. A mysterious illness has emerged that erases the very existence of everyone who suffers from it. The story does not, however, focus on the tragic aspect of this fairly post-apocalyptic setting, but rather shows the people and events the two travelers come across during their journey.