Please Don't Eat Me

"A bargain for 5 billion marukas." "Sure enough, it's a bargain." 'Ertha', who is destined to be eaten alive by the male protagonist bargained marriage with him to change fate! Ertha was reincarnated into a rated 19+ male-oriented fantasy novel. As the original story goes, Ertha was eaten alive by the protagonist Zahid, but I can't die like that because I have my little siblings. I offered a deal to the main character who'd eat me up. I'm the target of the proposal, 5 billion Marukas! All I have to do now is run away before the main character gets a chance to eat me. Can I, Ertha, escape from the hands of Zahid, the greatest wizard in the kingdom?