Hero or Demon Lord? Let me choose!

'''Hero or Demon Lord? Let me choose!''' is a reincarnation isekai.

Nanami was reborn in a world of magic after dying on Earth. When she regains her memory one day, an angel named Torta tells her that she will become a Hero upon swallowing a candy. Despite Nanami flatly declining the role, the angels assaults her and forces the candy down her throat; however it turns out she force-fed Nanami the Demon Lord candy. Rather than apologize to Nanami and call in God to undo the mistake, the angel forces the Hero candy next.

The result? Nanami is in a living hell; forced to be both the Hero and Demon Lord, stuck in an snipe hunt/endless cycle. Plus keeping the demons in check and away from harming humans; while trying not to lose the companions who cherish her in each of her roles.

Trivia

 * Nanami literally cant be killed. Even things that should kill the Hero or Demon Lord only work briefly on her. Why? Only the Hero can kill the Demon Lord and only the Demon Lord is allowed to kill the Hero. So even Nanami committing suicide wouldn't be able to free her from the insanity the idiot angel inflicted on her.
 * Though by that logic, as the laws of the world keeps reviving her, eventually this would get God's attention; because the cycle is completely broken.
 * It also gives the horrifying idea that Nanami wouldn't even be able to die from old age and end up the Greek Hero Tythonus, whom shiveled up to the size of a bug and begged for death