Severe internet addiction has become an epidemic infecting the nation's youth, ultimately resulting in their extreme dependence on the world wide web. Those who are too far gone are enrolled at Elite Reeducation Academy in order to help them grow into successful adults. Hibiki is one such teenager who awakens in the facility unaware of how he came to be there. He learns from the head instructor that he was knocked out and brought to the school at his mother's behest, concerned with how belligerent her son was becoming as a result of his internet addiction. Stuck in a place more akin to a prison than an academy, and with no escape from the abuses of the instructors, Hibiki decides to end his life by jumping from the roof. But as fate would have it, he meets a mysterious man named Shin who promises to give his life meaning...

Naota Nandaba is an ordinary sixth grader living in a city where nothing amazing ever seems to happen. After his brother Tasuku leaves town to play baseball in America, Naota takes it upon himself to look after everything Tasuku left behind—from his top bunk bed to his ex-girlfriend Mamimi Samejima, who hasn't stopped clinging to Naota since Tasuku left. Little does Naota know, however, that his mundane existence is on the verge of being changed forever: enter Haruko Haruhara, a Vespa-riding, bass guitar-wielding, pink-haired psychopath whose first encounter with Naota leaves him with tire tracks on his back and a giant horn on his head. Though all he wants is some peace and quiet, when Haruko takes up residence at his parents' home, Naota finds himself dragged into the heart of the greatest battle for supremacy that Earth—and quite possibly the entire universe—has ever seen.

Carefree high school senior Yuki Takeya every day looks forward to the School Living Club. Consisting of the president Yuuri Wakasa, the athletic Kurumi Ebisuzawa, the mature Miki Naoki, the supervising teacher Megumi Sakura, and club dog Taroumaru, the club prides itself on making the most of life at school. There is only one rule the club members have to follow: all members must live their entire lives within school grounds. Gakkougurashi! follows the adventures of the School Living Club as they promote independence and self-determination through their lively time residing at Megurigaoka Private High School.

Six years have passed since Rion discovered his own identity as an artificial being, yet succeeded in destroying the genocidal Mother Computer, Dorothy, before perishing himself. Now reactivated by Lilia, Rion awakens to find that Dorothy managed to execute one final catastrophic program, rendering a new evil crew to finish her goal of human annihilation. It is a fully 3D CGI animated OVA based on the hit PlayStation game, called Galerians, released in August, 1999. (Source: AniDB)