I made synopsis on the short story focusing on Priscilla Bariel, who is Emilia's rival on the election, and her mysterious one-armed knight, Al.
It is full of spoiler, I first tried to make spoiler tag but didn't used it because of readability. So, BEWARE of SPOILER.

Story starts with peasants talking about new wife of their baron, Leip Bariel. When they first saw Priscilla who just arrived as baroness, they were astonished by her beauty. But it quickly turned into discontent when she address them as losers who can't dare to resist Leip's tyrannic rule.
Priscilla freely criticizes and mocks both peasants and Leip, and left after whispering something to one peasant. A month later, Discontent quickly turned into admiration when that peasant's land got extremely abundant harvest, which continued on various subjects.

Then, We get some character introduction, Al and Schultz talking about their master. Al is Priscilla's knight(too obvious, isn't it?), participated in the competition for choosing Baroness' knight and got chosen. Schultz is Priscilla's butler, an 12~13-year old orphan whom Priscilla took from the town claiming he has potential(maybe for cuteness).
Al made some monologue about himself knowing how dangerous witches are, and he certainly has some kind of agenda. Priscilla comes in, get Schultz out to make some tea, and outright ask Al how his little scheme going, knowing he had been investigating on her after employed. While Al was surprised, considering his last resort, Priscilla simply disregarded it like 'it is natural for wanderer to be considerate in choosing his master' and forgives him.

Later, Al was talking with Leip who was furious about Priscilla acting on her pleasure, gaining popularity among peasants. Al explained his past as a gladiator in Volakia Empire, and Leip address Priscilla as Bloodstained Bride, whose every marriage ended with husband's death. Priscilla's marriage with Leip was 8th, and while her previous husbands all married Priscilla because of her beauty, Leip has a different reason.
Leip was an official managing the Dragon's Prophecy, and when he knew about the prophecy of royal election, he prepared beforehand to become king, marrying Priscilla before she was known to be the chosen participant.

(It is mentioned in the main story that election participants are forbidden from marriage until the election ends)

(Leip hid how he knew Priscilla was the chosen one long before the election started)

Leip wants Al's loyalty to him, revealing Schultz was already bribed by the wealth he promised and persuades Al to do the same, which Al complies.

After that, Leip's own knight arrives and take the position of Priscilla's personnal knight in the Election (Priscilla agreed because he was handsome enough). Al and Schultz was called by Leip, hearing Leip's own plot for becoming the king. When Leip disclosed his plan to brainwash Priscilla with the curse, however, Schultz rejected Leip's offer and called Leip's wrath. When Leip was about to blast Schultz with magic, Al takes a step forward to block it, finally realizing he liked Priscilla enough to be on her side. Al quickly kicked Schultz out of the room, leaving only Al and Leip.

Al claims he already brought out his trump card, saying 'it isn't personal, it was just bad luck... no, bad stars'
Leip casually blast Al with his magic, obliterating his body and leaving only the helmet on the floor. Leip mocks Al's puzzling words and turned to leave the room, just when he hear 'no, bad stars' again.
When Leip turned his back, Al was standing same as before, who was confused where Leip was gone. Leip shoot magic on Al's back killing him for 2nd time, but bewildered himself when he hear 'no, bad stars' for the third time.
Returning to Al's viewpoint, Al repeat his sentence again, confused when Leip suddenly disappear, and found Leip behind, who completely lost his sanity and collapsed. Al casually remarks that this time it was offender's side, and drags Leip out of the room.

While dragging Leip's body, Al meets Priscilla and Leip's knight. He saw Leip and was about to fight Al, claiming he will give Priscilla peaceful life instead of Leip. Upon hearing that, Priscilla summons burning blade and cut him down from the back, burning him to death. Priscilla already knew what Leip planned, explaining she didn't told Al and Schultz because they were bad at acting and couldn't hide they were already bribed.
Story ends with Priscilla hugging Schultz, and Al admitting he was charmed by her anyway.