——Are you willing to sign a contract with me?
——I do
——Swear on your soul, are you willing to accompany me forever?
——Yes, I swear on my soul, if the contract is broken, the soul will never be freed.
——Then the contract is established
(p. S. Ha, this is a short story written by a certain person when he was still in the second grade of middle school. Please feel free to complain)
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