Phi Series

is a Japanese light novel series written by Akira Satake, with illustrations by Enaga Chino. The series began publication on June 10, 2005 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
The amazing ability to control the "information" of all substances and even change the strength of the substance- "informatics". Nagisa Asakura, who enrolled in the only educational institution "Pascal", is fascinated by her mysterious classmate, HISAKA Dori, who is called φ "Phi". One day, Nagisa is involved in a murder at the school. A strange testimony discrepancy between Nagisa, who became the first discoverer of the corpse, and the police investigating the case, a mysterious message left on the scene ... Furthermore, what has been raised on the investigation line as a suspect in this mysterious case- !? The cyber mystery "φ series" developed by Nagisa Asakura and Dori Hisaka has started dignifiedly.