Synopsis.

In the captivating world of her twin brother's novel, Eun-kyung, a spirited and brave girl in her seventeens, finds herself mysteriously transmigrated into the story as a minor character, Ji-woo, who tragically died before the novel's time frame. The novel centers around the enigmatic protagonist, U-jin, who has devoted his life to seeking revenge, though his true motivations remain veiled in mystery.

Now residing within Ji-woo's body, Eun-kyung is diagnosed with Dissociative Identity Disorder (DID), as she is seen as another personality inhabiting Ji-woo's form by a physician. Surprisingly, she discovers the ability to effortlessly travel between her own world and the novel's reality, with Ji-woo regaining control whenever she returns to her own world. However, amidst this perplexing situation, U-jin, the relentless main character, pursues Eun-kyung like a puppet, his every breath filled with declarations of his intense and undying love for her.

As Eun-kyung embarks on her quest, she delves deeper into the secrets surrounding her birth and that of her brother's, as well as the true nature of the world she finds herself in. Throughout it all, Eun-kyung remains unwavering in her determination to seek justice and unveil the truth. And also to her astonishment, she begins to question whether Ji-woo's alleged suicide was indeed self-inflicted.

Join Eun-kyung on an enthralling journey as she navigates a realm where fiction and reality intertwine. As she confronts love, vengeance, and the grip of an indomitable protagonist, will Eun-kyung uncover the secrets hidden within the depths of this bewildering world? Or will she succumb to unseen forces, forever imprisoned by a destiny not of her own choosing due to the mistakes of her past? And what if unearthing the knowledge of her previous life reveals that she was once enemies with her current friends? How will this revelation impact her and those around her? Bonds will surely be tested, and Eun-kyung must face the consequences of her past actions, coming to terms with the choices she made.