(The shopkeeper of the Convenience Store is your best example.)

(He will discuss the rules with you in advance, and once both parties agree, he will never go back on his word. Within the rules, he can cheat, exploit loopholes, or use hacks, but he will never break the rules.)

(Even if he's caught cheating, he won't go back on his word or get angry. He will still honor his promise and give you what he agreed to, unchanged.)

(When you made a deal with the woman, you clearly agreed to take the doll first and then give her the body.)