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Aspiring trainee Jeongguk has been with the same company for years only for his dream to come crashing down. Blinded by rage, Jeongguk ends up getting kidnapped by a mafia-run by Boss a man with no weaknesses.
Jeongguk must call him Daddy and become a little in order for his own survival and the very mission he was kidnapped for.
Somewhere along the line, unwanted feelings are developed and the man with no weakness gets one - for better or worse.
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