Therapy after Carnage

The Cosmos had dealt his hand in this chess board called the Universe.
For the mecha powered universe the Tired Queen was chosen and from the parallel world that had deviated paths due to fate the Bored Executioner had fit the match.
When the two switched positions then it seemed balance was restored.
But that depended on whether both carried out their roles well.
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This is a tale of two chaotic souls who switch worlds and find the place where they're most content and fulfilled.