Dennou Coil (Den-noh Coil)

Eleven years after the introduction of internet-connected, augmented reality eyeglasses and visors, Yūko Okonogi moves with her family to Daikoku City, the technological center of the emerging half-virtual world. Yūko joins her grandmother's "investigation agency" comprised of children equipped with virtual tools and powerful metatags. She quickly crosses paths with Yūko Amasawa, an expert hacker of the virtual environment, as Amasawa relentlessly seeks to "unlock" the mystery of a computer virus that emerges from an inaccessible corrupted space. (Source: Anime News Network)

Dennō Coil Wiki

Dennou Coil (TV Series 2007) - IMDb

dennou coil - What is the fate of Densuke at the end of the last episode? - Anime & Manga Stack Exchange

Watch Den-noh Coil

Watch Den-noh Coil

Yūko Amasawa, Dennō Coil Wiki

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Den-noh Coil TV Review

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Den-noh Coil

Dennou Coil (TV Series 2007) - IMDb