War with your little sister...
How it starts
It would all start when your know that your little sister would be joining your classroom this year. That's how it starts. Then you decide to have a war with your little sister who is better at math than you are. Who ever earns more money at the end, wins all the money and the looser gets nothing. But at the end of the story there's a twist of events.. It all starts with one bet. Who would win..?