Ice

The anime Ice is set in a post-apocalyptic Tokyo, where a catastrophic event in 2010 wiped out all men, leaving behind a small population of women. The survivors are divided into two main groups: those who accept their fate and live carefree lives, and those who attempt to preserve humanity through scientific means. The story revolves around the conflict between these groups, particularly regarding the potential of a specimen known as "ICE" to save humanity. This conflict is central to the narrative, unfolding in the heart of Tokyo.