100 years after the loss of Dr. Lee Hongbin and his cyborg girlfriend Youngji, his cyborg became a vessel of their memory so that they would be remembered of their final act of love.

Having been asleep all that time, they haven't witnessed the changes the century had: Humans are nearly extinct and military cyborgs are being replaced instead. One small boy is the last human on Earth and his parents find the lab the five cyborgs made by Dr. Lee Hongbin are asleep in, and when the boy touches one of them, its eyes open to reveal a metallic silver with black spots.

Blinking once, the monotone voice mutters, "I think I miss you even more."

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Hello fanfic readers and VIXX lovers! Since I just couldn't forget about VIXX's "Error" I decided to make a sequel of "Mechanical Heart" that's going to be longer than the original. Stay tuned and a whole new adventure will begin!