At your service, my lady

After dying due to a terrible disease, Fausto wakes up as the character of his favorite novel.
He reincarnated as the most loyal servant of the villainess!
Their fate is to die at the hand of the heroine and the prince, but the pent-up feelings from the original character will not allow Fausto to let such an ending happen.
Now, with a new body and mixed feelings, Fausto has to find a way to reach a happy ending for himself and his mistress.
The method does not matter.
He will protect what is precious to him.