Miss Simian has to save herself from a contagious Joy virus infecting the whole school. After Dad gives Gumball and Darwin a special hug, the kids go to school filled with a virulent form of Joy. Miss Simian quickly identifies the terrible affliction, and soon enough it spreads to the other kids. She has to find a cure before it's too late. Before Ms Simian herself is won over by . . . Joy.
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