Swin! Angnyeoga Anira Hyeongsayeyo

A detective who is possessed by a princess from a romance novel and goes on a wild love search!

Seo Hyun, a violent crimes detective who was chasing a serial killer who only murders web novel writers, gets caught with the criminal who jumps to his death right before his arrest. When she opens her eyes, she finds herself in the world of the novel, and is possessed by a villainess who is obsessed with the male protagonist, Kylian, and commits atrocities against the female protagonist in the original novel before dying! Kylian, who should be in love with the female protagonist in the original novel, suddenly changes and becomes obsessed with the crown prince Diego and even woos the capital commander Eron, who was just a friend! Meanwhile, a serial murder case identical to the real world occurs in the novel world, and Seo Hyun is shocked to find out that the criminal has also possessed her…

(Source: Kakaopage, translated)