Help?

I forgot the name of this manga. Its about this girl who dies but it reincarnated into a male who is from a book she loves. She realizes she dies in the book due to the king killing her for betraying him. So she decided she’ll avoid him. But while shes hiding he finds her/him and after they talk she leaves hurried but takes his book instead of her yaoi book. She gains this curse for reading the book. He finds out and takes her to a wizard. The wizard says she/he will die but can be stopped by gaining someone else's fluids. That’s all I can remember. Help please!