Last Man Standing

Asher Bond is the last male on Earth as 99% percent of male population completely died out, leaving Asher the last man on Earth being the last male on earth is hard as he was hidden away from his Sister and Mother not wanting him to be taken away by WLW (World League Women) But question roams in Asher mind how did the male population got wiped out it will be up to him to figure it out as the last man standing.