Transmigrated Into a Book as Cannon Fodder, My Yandere Sister Wants to Usurp the Throne Every Day

When Su Mu woke up, he had become the most useless, carefree prince in the Great Zhou dynasty. From the start, he picked up a starving little girl by the roadside.

Six years later, thanks to his ridiculous System, which “drops gear whenever his little sister gets angry,” he had transformed the barren northwest into an industrial eldritch nightmare that made the whole realm tremble.

Steam locomotives raced everywhere, and cannons could blast a mountain flat.

Outsiders revered him as the Iron Ning Prince. Su Mu himself was completely baffled: How did I even get this strong?

Then one day, he happened to open his sister Wu Yihuang’s locked diary:

“Today, Brother smiled at that woman craftsman three times. I’ve arranged for her to work at the pig farm.”

“That wretched Jiang Ran wrote to Brother again. Next time I set a fire, I should burn down her family shrine.”

“Once I seize the throne, I’ll lock Brother in the imperial palace so he can look at no one but me for the rest of his life.”

Su Mu: ???

A sweet, soft voice came from behind him. “Brother, what are you reading?”

Su Mu turned stiffly and met his little sister’s beaming smile, and the gleaming kitchen knife in her hand.

Su Mu: System! What the hell, she’s a yandere!!!