The Dark History of the Reincarnated Villainess, Vol. 6

It all began with Konoha Satou's Dark History, a fantasy romance fic written for her own satisfaction as a teen. But now, as its most odious villainess, the details are a matter of life-and-death! After somehow landing herself a fiancé following said man's nearly fatal duel with Ginoford, Satou was looking forward to at least a short break from the craziness of Iana's life. But when a ninja shows up claiming her requested assassin is finally available to do her bidding, she plunges into chaos once more!

Volume 6 of The Dark History of the Reincarnated Villainess manga series by Akiharu Touka.