Agnes, the daughter of a marquise, is told that her long-time unrequited love and fiancé, the crown-prince Lucilleur, has called off their engagement, while standing next to another woman. If he will never love her anyway, if he will only abandon and oppress her, then she will finally... be free. Agnes had done so much defend her home, her freedom, and her pride, which made her become obsessed with Lucilleur. Two stubborn people who are unable to be honest with each other, and the course of their entangled love story will lead to... (Source: Ichijinsha, translated)

An anthology comic of Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta... by various mangaka.

"I don't need to fulfill my wifely duties"...or so she thought. But wait, it seems she's fallen in love with him!? The peaceful(?) newlywed life of a slightly off-kilter, authentic young lady and a strict Marquis! I really don't want to. But I can't imagine a future without you! Anneliese has married Arnaud, who is rumored to be a cold-hearted, strict Marquis. At first, Anneliese hated marriage and even ran away from home, but when he told her, "All I want from you is to be the mother of my son, Michael. That's all," she accepted the proposal. Still, since they're living in the same house, she thought they should get along, and decided to make Arnaud's favorite salad... But... Arnaud, who had previously been indifferent, is now troubled by his slightly(?) off-kilter wife's behavior...!?

Anthology of D.Gray-man doujinshi written by different artists. Pairings: Allen x Kanda, Kanda x Allen