From the Introduction:
The Jedi have been infiltrated by Sith! The Council has charged young Jedi Knight Momoko with rooting out any Sith infiltrators or Dark Side masters hiding within the Jedi ranks.
Jedi x Sith is a play set for G x B (Girl x Boy). You'll need a copy of G x B to play.
Here's how it works: Momoko has three suspects, the brash and rebellious Knight Ichigo, the respected and well liked Knight Risa and the brilliant but mysterious Knight Takamichi. Momoko will go on a mission with each Jedi, studying their techniques and trying to uncover their true allegiance. After the three missions Momoko will report her findings to the Jedi Council, and if there is a Sith infiltrator, confront the traitor!