Holy Grail Of Eris (Manga) Vol 02

The day after the fiasco at the aristocratic party, Scarlet Castiel demands her compensation for saving Connie's life: help her take revenge on those who orchestrated her execution! Despite her initial hesitation, the normally reserved Connie joins hands with the supposed villainess of the century to finally bring the truth to light! Yen Press
(W) Kujira Tokiwa (A) Hinase Momoyama