Transmigrated as the Real Heiress, I Was Kissed by the Sickly Obsessive Villain

Su Wan transmigrates into a book as the villainess, who is doomed to die within three months.

From the start, she's drugged and on the verge of going to bed with the antagonist, the beginning of her death.

To save her own life, she immediately decides to assassinate the antagonist. The assassination fails, however, and he latches onto her instead.

When she tries to escape, he pins her to the bed and says, "If you want to kill me, why not make me feel so good I could die?"