Rewrite The Stars [Klance]

After Keith loses a bet he has to join the drama group. Lance, the victim of the bet, is in the group as well. He makes sure everone knows he's going to get his revenge on Keith for what he did and so their little rivalry starts.
But why is it that Lance comes running to Keith for help when he's desperate and doesn't see another way out? And why is it that the thing Lance needs Keith - and only Keith - for, is a weird situation that exposes them in ways they hadn't seen each other before? Will it be enough to end their grudge against each other?

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*This story is spoiler-free. There will be no spoilers of the show and you can read it even if you've never watched it/never heard of it.