Mephisto's Gold Coin

"As long as you are willing to sign this contract, no matter what you want, Gold coins will help you achieve it~~~" "Aren't you just a moneylender? The Anti-Fraud Center does not allow you to borrow money from people you don't know. " "How about giving it a try?" There is a parallel world now, You traveled through time and space to an 11-year-old boy, There was an explosion that wiped out all humans over the age of twelve. Your task is to keep the host alive, The maximum number of gold coins is 3, Settlement will be based on your completion level.