Ninomiya Shungo is an average high school student who lives at home with his older sister Ryouko. However, Shungo's life changes when a cute girl named Tsukimura Mayu arrives on his school grounds in a military helicopter. It turns out that Ryouko sent her, along with her older brother Mikihiro, to live in their home.
Nogizaka Haruka is the most popular student at the prestigious Hakujo School, not only for her beauty, but also for her innate talents and her family's influence. However, Haruka harbors a secret, the revelation of which could destroy her reputation.
The year is 2022, and there has been a breakthrough in virtual reality technology. Engineers succeeded in creating a headgear called NerveGear - a tool capable of bringing the user's consciousness into the world of games.
A long time ago, Fujishirou Kosuke confessed his love to his friend. He vowed to remain pure until they could be together so he could experience his first time with her. Years later, the boy wakes up in a prison cell and realizes that he has been kidnapped...
Tsubaki Akira is an average high school student. One day Urabe Mikoto joins his class and takes the seat next to him. Urabe Mikoto gives the impression of being secretive and even cold - the fact that her hair covers half her face doesn't make it any easier to read her emotions. On the very first day she gets the name of the weirdo, because she suddenly bursts out laughing during the class.
Twenty-year-old Michino Saki was kicked out of her home by her older sister. Wandering the streets, she meets a stranger in his thirties, Oota Renta. He lets her stay the night at his place after she faints near his apartment. However, Saki is hiding a secret. She is a succubus - she needs the essence of a man to survive.
Miyazawa Yukino is the most recognizable girl in school and the president of her class. She has no weaknesses, and her grades are always good enough to put her at the top of the honor roll. On top of that, she makes new friends easily, which has always made her an object of admiration. In reality, however, all this is nothing but her other face.
The year is 1985, and Sakura High School students Kurabe Juurou, Fuyusaka Iori, and Amiguchi Shuu are experiencing a strange phenomenon of dreaming together about Kaijuu wars in the past and future. They are also watched over by a school nurse named Morimura Chihiro, who provides an unknown type of medicine to several students of their institution.
As a child, Urashima Keitarou promised his friend that they would meet again while studying at Tokyo University. Unfortunately, the boy fails the qualifying exam. However, he doesn't give up and decides to devote the next year of his life to preparing decently for the next enrollment.
Hanabishi Kaoru is a college student, but lives alone due to a difficult family situation. One day, at the train station, he meets a beautiful troubled woman dressed in tsumugi. The boy decides to help her find an address, which, as it later turns out, is located not far from his apartment.
Engineers succeeded in creating a headgear called NerveGear - a tool capable of bringing the user's consciousness into the world of games. The launch title for this platform was Sword Art Online.
One day, after class ends, Manaka Junpei goes out on the roof of his school to watch the sunset, but is unexpectedly bumped into by a beautiful girl who, falling down, awkwardly reveals her underwear with a pattern of strawberries, then embarrassedly runs away. Junpei tries unsuccessfully to discover her identity, but quickly comes to the conclusion that he has never seen someone so beautiful at his school before.