Mordred

Lain Iwakura appears to be an ordinary girl, with almost no experience with computers or technology. Yet the sudden suicide of a schoolmate, and a number of strange occurrences, conspire to pull Lain into the world of the Wired, where she gradually learns that nothing is what it seems to be.

On June 1983, Keiichi Maebara moves with his family to Hinamizawa, a peaceful rural village. He quickly befriends his new schoolmates Rena Ryugu, Mion Sonozaki, Satoko Hojo, and Rika Furude, usually spending their leisure time playing board games.

About one thousand years into the future, civilization has been retrograded and humans are living dispersed within small communities. People in this era have a psychic power called "Juryoku" which materializes things they imagine.

Set in the 24th century, mankind has successfully terraformed Mars, making it a habitable planet and renaming it to planet Aqua. Now mostly made up of water and ocean, humans use unmotorized gondolas to travel around their cities.