Riesche Irmgard Wertzner, daughter of a duke, has a secret—she dies at age twenty and loops back to a moment five years prior. As her seventh loop begins, she swears to live a long, relaxed life. Then, the man who killed her in her sixth life appears!

Arnold proposes marriage to Rishe. She replies with certain conditions which must be met. Arnold gives his promise, and he and Rishe head to Galkhein. Rishe is excited to visit a country she's never been to, but wonders—what is Arnold truly after?

Rishe's new life in Galkhein begins with cleaning the villa that's her new home. She attends a party where she's presented as the prince's fiancée. Dancing with Arnold brings up memories of her past life, spurring her to test him just a little.

Rishe has kept a certain activity of hers secret from Arnold, but when he appears right in front of her, there's no escaping his notice. Later she learns that Michel believes Arnold fulfills every condition necessary to conduct a particular experiment.

Rishe and Prince Kyle work to prevent Coyolle's future downfall. After making preparations, they gain the opportunity to negotiate with Arnold again, but things don't quite go to plan. Then, a message from Theodore arrives, interrupting their discussion.

Michel has decided who he'll give his black powder to, but Rishe plans to stop him using experience from her past lives and relationships built in this life. Will she be able to convince Michel? What will Arnold do when he sees the results of her plot?