This was originally inspired by a technique used in storytelling where characters always seem to deserve the things that happen to them, because of the way they behave beforehand. In this game, a naive younger girl would get jealous and annoy her older sister in a way that would make her deserve the things that happen to her.
The other characters would always be coming up with plans to try to make money, kind of like in the cartoon Ed, Edd, and Eddy. But in this game, the 3 characters consisted of a greedy girl, a pervert, and a weapons expert. And each one had their own approach to making money.
Speaking of plans, here are the original planning notes for this game.