7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy!

The duke's daughter, Rishe Irmgard Weitzner, has a secret that if she die at the age of 20, she would loop back to the moment her engagement was broken off. "This is my seventh life, and I want to live forever!" Rishe meets Arnold Hein, the crown prince of Galkhein, who killed her in her sixth life. Rishe leaves to avoid trouble, but a sly grin appears on Arnold's face.

Arnold proposes to Rishe, leaving her confused, since he was the one who killed her in her sixth life. "I'm just in love with you," he declares. Rishe sets some conditions and Arnold agrees. He returns triumphantly to the country of Galkhein, the only country she hasn't visited in her past lives. While Rishe is thrilled about her new life, she remains uncertain about Arnold's true intentions.

Rishe's new life in the Galkhein has begun. While she is busy cleaning the villa that would become her residence, she decides to attend a dinner party to show off her fiancé. She dances with Arnold and recalls memories of her previous life. The nobles applaud her brilliant performance. However, during the dance, Rishe feels something strange about Arnold and asks him about it...

Kaine Tully from the Aria Trading Company arrives for a business meeting with Rishe. She had intended for him to arrange goods for her marriage ceremony, but he informs her, "I have nothing to sell you," and cancels the meeting. In her past lives, the Company’s sales channels had been crucial in preventing wars. To persuade Tully to return to the meeting, Rishe comes up with a plan.

It was Theodore, the second prince, who invited Rishe to the chapel under the guise of Arnold. Theodore warns her that she will be killed sooner or later. but Rishe told him that she knows everything and that she is ready to marry Arnold. Suddenly, Arnold himself appeared. Rishe is unsure of Theodore's true intentions, but Arnold takes an unexpected action...

Theodore, having confined Rishe, negotiates with Arnold. Theodore aims to become the next emperor and pressures Arnold to renounce his claim to the throne in exchange for Rishe's freedom. Just as their conversation reaches a stalemate, Rishe unexpectedly appears and challenges Theodore's motives. She also scolds Arnold for his cold demeanor toward his brother, but...

Once the commotion settles, Rishe requests to stay with Arnold at the villa. Upon seeing the villa arranged with her maids, Arnold tells Rishe that she has a remarkable talent to give other's pride in their work. Rishe suggests they practice sword fighting together—a long-held desire of hers—and she finally gets to experience the special] training that the knights of the Imperial Guards undergo...

Arnold invites Rishe on a secret trip to the castle town, where they visit a jewelry store. His intention is to give her a ring for their wedding ceremony. Although rings aren't necessary for marriages in this country, Arnold's persuasive words lead her to choose a ring. Rishe then learns from Arnold that the royal family from a certain nation will be visiting Galkhein before the wedding ceremony.

Rishe gathers herbs from the fields of Arnold's villa for Kyle, the first prince of Coyolles, who is ill. She encounters Michel, a genius scholar who was her teacher in her third life. The next day at a banquet, Rishe notices Arnold and Kyle sneaking away, where Kyle proposes an alliance with Arnold so that Coyolles, to help Coyolles compete with other nations despite its lack of military power.

Rishe takes part in knight training while disguised as a man. But Arnold discovers that she has been training in secret. After obtaining conditional permission, she asks Arnold why he does not want to form an alliance with Coyolles, but Arnold dismesses her concerns. Furthermore, Rishe learns that Arnold possesses all the necessary elements for Michel's "experiment"...

To prevent the destruction of Coyolles and stop Michel's ambition to demonstrate the power of gunpowder, Rishe decides to form an alliance with Prince Kyle. After extensive preparations, they finally had the chance to negotiate with Arnold. Rishe and Kyle wisely appealed to Coyolles' technological strengths and determination, but they receive an unexpected message from Theodore...

Rishe and Michel clash over the issue of gunpowder. Michel aims to see the world's outcome by granting Arnold this gunpowder, while Rishe tries to persuade him against it. She utilizes the network she has made and her alliance with Kyle. Will Rishe's trick and the experiences she has gained in her past life, be able to pursuade Michel? And how will Arnold react and do when he encounters "it"?