Japan hosts an East Asian international tournament in 2020. Many thuggish personalities are travelling to Japan for the event. Kicking into action is a woman who was raised by the Yakuza and has become an assassin. She is tasked with protecting Japan from the thugs during this tournament. She will kill many of the louts. She also meets a member of a pop idol group.
After their class reunion, Yukari, Kiriko, and Niko launch a website for punishing people who have done wrong, yet escape law enforcement. As their website goes viral, Kiriko and Niko's acts of violence increase in intensity to satisfy their need for attention and the demands of their growing subscribers.