Zapfic 50 Monday - prompt : Expect

Hello hivers and zapfic short story lovers.
The story below is a 50 words microfiction story written with the prompt expect.
It is my entry to zapfic 50 Monday.
Thanks

Source

The game wasn't something new to them.
Once they throw the dice, it must be a head or a tail which is in their favor.
Their agents represents the two, one standing in for the tail, the other the head.
They never expect the game to change but it did.