Childeath

In the near future, the Earth itself has given up on humanity and began to produce "witches," creatures designed to exterminate humans. The Witch of Time has cursed all humans to die when they reach adulthood, leaving only children as the only survivors on the planet. The remaining children are also being hunted by various witches and dying every day. But there is one girl who refuses to give up, and she is determined to strike back against the witches…? (Source: Young Animal Web, translated)