7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy! follows the intriguing story of Rishe, a young woman caught in a mysterious cycle of reincarnation. Each time she reaches the age of twenty, she dies and returns to the day of her engagement. Across six lifetimes, she has lived diverse lives, including as a merchant, a knight, and a pharmacist, mastering different skills along the way.

In her seventh life, Rishe resolves to live a luxurious and carefree existence. However, this dream takes a dramatic turn when she receives a marriage proposal from Arnold, the crown prince who had killed her in a previous life. Using her experience from past lives, Rishe navigates political intrigues, romance, and personal growth while aiming to secure a peaceful life despite the challenges ahead.