In the town of Kurouzu-cho, Kirie Goshima lives a fairly normal life with her family. As she walks to the train station one day to meet her boyfriend, Shuuichi Saito, she sees his father staring at a snail shell in an alley. Thinking nothing of it, she mentions the incident to Shuuichi, who says that his father has been acting weird lately. Shuuichi reveals his rising desire to leave the town with Kirie, saying that the town is infected with spirals. But his father's obsession with the shape soon proves deadly, beginning a chain of horrific and unexplainable events that causes the residents of Kurouzu-cho to spiral into madness.

On a solemn night in July 1998, teenager Fujino Asagami is mercilessly raped by a street gang in a dilapidated bar. No matter what physical or sexual abuse they deal, however, the girl regards her captors with the same apathetic expression. The next day, mangled bodies are discovered in that same building, so torn apart that investigators find it infeasible to even consider the culprit human.

Elsewhere, a client request reaches Touko Aozaki's detective agency, tasking Shiki Ryougi with either capturing or killing the perpetrator of last night's incident. But soon, word spreads that a single survivor escaped the slaughter, and now the murderer is plowing down everything in their path to locate and exterminate him. A brutal race against time begins, pitting Shiki against a dangerous foe imperceptible even to her legendary eyes. 

[Written by MAL Rewrite]

In a Tokyo where gravity has broken, a boy and a girl are drawn to each other... The story is set in Tokyo, after bubbles that broke the laws of gravity rained down upon the world. Cut off from the outside world, Tokyo has become a playground for a group of young people who have lost their families, acting as a battlefield for parkour team battles as they leap from building to building. Hibiki, a young ace known for his dangerous play style, makes a reckless move one day and plummets into the gravity-bending sea. His life is saved by Uta, a girl with mysterious powers. The pair then hear a unique sound audible only to them. Why did Uta appear before Hibiki? Their encounter leads to a revelation that will change the world.

Going into her first year of high school, Nanami Takahashi is filled with the hope of making many new friends. After meeting the shy Yuri Yamamoto, she hears about a popular boy in their class: Yano Motoharu. Yuri cares little for Yano because of his past relationship with her older sister Nana, and at first, Nanami doesn't like his attitude either. However, Nanami soon begins to warm up to Yano and takes a liking to him. The two spend more of their time together and eventually decide to start dating. But their love is not without challenges; Yano has trouble opening up to Nanami, since his first girlfriend, Nana, died in a car accident the year before, and she had been with one of her ex-boyfriends at the time. Finding themselves living in the shadow of Yano's relationship with Nana, Nanami and Yano struggle to keep their relationship afloat amid misunderstandings and heartache with the certainty of their love for each other. [Written by MAL Rewrite]