Other Title: 仮面ライダービルド-陰謀のセオリー, Kamen Raidā Birudo-Inbō no Seorī
Summary: Sawa was revealed to be a spy for Namba Heavy Industries! It was her job
to secretly collect data on the Kamen Rider system as a military
weapon. Thanks to Sawa's info, Sento has become aware of the connection
between Namba Heavy Industries' intentions and Faust's mission to
reclaim the Pandora Box. Sento manages to unlock a new Best Match in the
middle of a fight, however the prospect of Faust being aligned with the
Touto government raises an unexpected behavior within Sento...