MTL - One Useless Rebirth - Chapter 23 triple

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

Chu Li was a particle physicist until a freak accident took his life and transmigrated him to a parallel universe – one where he wakes up with inexplicable abilities and finds himself in the running for a job in the imperial palace.

This is a story of heroic adventures, cunning strategies and romantic tales. How will our MC thrive in a world completely strange to him? Where will his ambitions and abilities take him in the palace?

- Description from Novelupdates

Billions of light years away, on a planet where magic flows through every creature, two dominant species battle for supremacy, 'Humans and Ants'.In this world, Ants aren’t just insects, they are the most intelligent and powerful race who challenged humans, wielding magic and evolving in ways no one can predict.Reborn as an ant in this brutal, predator-filled realm, Kai refuses to accept a life of insignificance. With a sarcastic system, ultimate skills, bizarre evolution choices, and a talent for chaos, he sets out to defy fate.From dodging death against Dragon Men, Ape Men, Wolf Men and Termite Kings, etc to building his own army, Kai’s journey is one of relentless growth, cunning strategy, and outrageous battles.Survive! Evolve! Conquer! The world isn’t ready for the rise of the most overpowered ant in history.

She was a medical expert, talented and beautiful. She was reborn as his little wife. Her in-laws did not like her, her husband did not love her, and she was as timid as a mouse. She was weak and easy to bully.