"In Her Fifth Life, the Villainess Lives With the Evil Dragon" centers on the protagonist, a woman who has lived through four previous lives, each ending tragically due to her role as the villainess in a recurring story. In her fifth reincarnation, she resolves to break the cycle and avoid the fate that has plagued her. This time, she awakens with memories of her past lives and uses this knowledge to alter her destiny.

The story begins with the protagonist, now named Lilith, living in a remote village, determined to avoid the political intrigue and romantic entanglements that led to her downfall in previous lives. However, her plans are disrupted when she encounters an ancient and powerful dragon, known as the "Evil Dragon," who has been sealed away for centuries. The dragon, named Drakar, is drawn to Lilith due to her unique aura and the lingering traces of her past lives. Despite her initial reluctance, Lilith forms an uneasy alliance with Drakar, recognizing that his strength and knowledge could help her navigate the dangers ahead.

As the narrative progresses, Lilith and Drakar uncover a larger conspiracy involving the kingdom’s ruling elite, who seek to exploit the dragon’s power for their own gain. Lilith’s past lives are intricately tied to this conspiracy, and she gradually realizes that her repeated deaths were not mere coincidences but part of a deliberate scheme. Together, Lilith and Drakar work to dismantle the forces working against them, with Lilith using her accumulated wisdom and Drakar’s formidable abilities to outmaneuver their enemies.

The relationship between Lilith and Drakar evolves from one of mutual distrust to a deep, albeit unconventional, bond. Lilith’s pragmatic and resourceful nature contrasts with Drakar’s aloof and enigmatic demeanor, creating a dynamic partnership. Supporting characters, including former allies and adversaries from Lilith’s past lives, add complexity to the story as their motivations and loyalties shift in response to the unfolding events.

The manga explores themes of redemption, resilience, and the consequences of one’s actions across lifetimes. Lilith’s journey is marked by her determination to rewrite her story, while Drakar’s presence introduces elements of mystery and supernatural intrigue. The interplay between the human and fantastical elements drives the narrative forward, culminating in a climactic confrontation that challenges both characters to confront their pasts and redefine their futures.