I Transmigrated! I Married the Chancellor’s Daughter, and She Makes Me Sleep Separately

An engineering-minded straight man transmigrates into the heir of Beiliang, a man who has been cheated on, poisoned, and dismissed as useless. He faces a stunning princess consort who despises him, a scheming stepmother coveting the throne, and the Beiliang army poised to revolt. He turns the tables with blast furnaces, trigonometry, and queueing theory, bringing barbarian princesses, sect saintesses, and enemy spies into his bed, while refusing to indulge women.