He had previously stumbled into the revelation that magic and programming were more or less the same, and had been building a Demon Summoning Program in his spare time.

Everyone knows that Nakajima is an ace programmer, but there's one thing no one knows: he's also an amateur magician. Humiliated and infuriated by the injustice, Nakajima goes about getting his revenge. The reason? Nakajima had rejected Kyoko Takamizawa's advances, and in a fit of petty vengeance, she manipulated Kondo's crush on her to deliver Nakajima a vicious beating by proxy. One day, Akemi Nakajima, one of the gifted and something of a maverick within the school, has the bad luck of being targeted by the semi-delinquent normal Kondo Hiroyuki. In Jusho High School, the student body is divided into two groups: the gifted class and the normal class. There was also a sequel series of six novels also by Nishitani, titled New Digital Devil Story, that deals with the aftermath of the original trilogy. The first novel was adapted into an OVA as well as given a video game sequel (same title as the first book, but with 'story' written with the kanji for 'monogatari', and 'story' in furigana). Written in the late 1980s, there are three books in the series: Digital Devil Story: Megami Tensei (Reincarnation of the Goddess), Digital Devil Story 2: Mazu no Senshi (Warrior of the Demon City), and Digital Devil Story 3: Tensei no Shūen (Demise of the Reincarnation). The original source material for the Shin Megami Tensei video game series and all of its many derivatives, Digital Devil Story is a trilogy of novels written by Aya Nishitani.

Digital Devil Story by Aya Nishitani