The Kotonoha Project web novel is a digital serialized light novel, broken up into five main arcs as in the music series. This covers the background information and additional characterization that was not seen in the PVs, although the illustrations used often come from the PVs as well.
Typically, each installment is broken up into a series of Parts, each series covering one song in the canon. Altogether, the novel makes up 105 chapters and 21 Parts. The digital novel does not cover the prequel song and use it as the basis for a seies, however.
The web novel is available for free public reading on the main website.
- Ko-To-No-Ha Yugi (Part 1, Part 2, Part 3)
- Reverb (Part 1, Part 2)
- Sennou(Part 1, Part 2)
- Barbed Eye (Summary)
- Karaibari Behavior (Part 1, Part 2)
- Wakaranai (Part 1, Part 2)
- Soushi Sou Ai (Part 1, Part 2)
- Tengoku to Jigoku (Part 1, Part 2, Part 3)