After Her Engagement Annulled, the Weak Rich Daughter Becomes a Big Shot! - Chapter 15

With the unexpectedly obtained unknown civilization technology, bionic robots, artificial intelligence, quantum mechanical transmission, supercomputers, plasma thrusters, nuclear fusion, these black technologies are constantly being manufactured in Wang Xiao’s hands.

Knowledge is power. With the help of unknown civilization technology, Wang Xiao, who has acquired this knowledge and black technology, has tickets to a better future and a sea of stars.

- Description from Qidian

After dying a pathetic death as an overworked office drone, I woke up reincarnated as Archer—the bastard prince of the Brutish Empire.My existence is a royal secret as My father, the King, would rather pretend I don't exist. My half siblings get royal treatment while I'm hidden away like a dirty secret.But I have a secret of my own. I was OP.By age two, I realized monsters flee from my stupidly OP mana. By age ten my mana could level cities—if I dare to unleash it.When my half-sister is kidnapped by the demon king, I finally decided to step out of hiding to become the strongest in this new world.

Suddenly a high school student Subaru Natsuki has been summoned to another world on the way back from the convenience store. With the biggest crisis of his life being summoned to another world and no sign of the one who summoned him things become worse when he is attacked.