Task: Story Composition
Input (English): Premise: Mike is trying to increase his muscle mass. 
 Initial Context: He bought these protein supplements. 
 Original Ending: However, they taste awful. Mike threw them out after a week. It just was not worth it to him. 
 Counterfactual Context: He bought a membership to the gym.
Output (English): However, the gym is awful. Mike stopped going to that particular one after a week. It just was not worth it to him.