An ambitious magically binding bet made with Draco backfires forcing Ginny and Hermione to kiss and the only thing more confusing than how they were outsmarted by Draco and why he would do this is how come they enjoy it so much?

It's been done, but here's my shot at the old Marriage Contract type story. Harry and Daphne Greengrass find out their parents put together a marriage contract when they were born, now they must deal with it.