The Holy Grail of Eris Novel Volume 3 was written by Kujira Tokiwa with illustrations by Yu-nagi.

Scarlett and Connie are finally closing in on the truth of what happened ten years ago, but Daeg Gallus is determined to eliminate all obstacles to the Holy Grail of Eris, with Connie and her fiancé Randolf at the top of the list. To thwart their plan, Connie allows herself to be framed and imprisoned, ensuring Randolf's freedom. But she never dreamed her actions would result in the first order of execution in ten years—with her head on the chopping block!