Yuusha wa Shimei wo Wasureteru

In order to save the world, the female hero, Hizumi is about to engange in the final fight against the Demon king. However, he asks her to talk things out, not trusting the words of the Demon king, the female hero draws out her sword, but...?
A Hero x Demon forbidden... love(?) comedy, begins!!

(Source: Manga Rock)