Harry Potter and the Dovahkiin - Chapter 43: Dragon’s egg

How did he meet such a bandit-like man? He drags you away the second he sees you! And yet, the only thing he can do is try his best to set the boundaries between them.

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“Don’t you ever try to leave and reason things out. It’s futile. Yelling is also useless. This lao zi has already fallen for you and I shall make you mine.”

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“Be obedient and wait for me at home, so I can pamper you till the day I die.”

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“Running away? What about it?

You dare to run away again and this lao zi will spend his lifetime seeing you try.”

- Description from Novelupdates

Chu Nan was just an ordinary student, but because of an accident, he obtained the data collection, analysis and processing ability equivalent to the most advanced optical brain.

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
…
It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

A fighting genius.