Reincarnate as the Villainess's Husband - Chapter 61: Inputs and outputs

The youngest Wiseman of the continent, Chu Tian, has traveled 30,000 years back in time to the age of antiquity due to an accident.

This is a prosperous era. Rare herbs, minerals, treasure relics and monsters can be easily found throughout the land.

However, this is also an undeveloped era. Communications, traffic, martial arts and technology are in its early stage of development. Prosperous cities lack lighting while its citizens are uneducated.

Our decisive MC using his future knowledge creates Magic powered light bulbs, magic powered telephones, magic powered cannons, magic powered computers, artificial intelligence, psyche internet. 30,000 years worth of knowledge allows him to create miracles and shine brightly in this era. Allowing him to conquer the land and sit firmly on the throne of the 10 realms.

- Description from Novelupdates

Being given a chance and reincarnated is nice and all, yet why do I have to become that male friend who just watches the protagonist flirting with his harem?---World: Kaguya-sama: Love Is War - Hyouka ----

Nan Yu was brought by the Nan Family back from the countryside to pretend as the fake heiress, being forced to marry the paralyzed and tyrannical young master of Huo Family on behalf of the real heiress.Before the marriage, she was just a fake heiress who had been abused since childhood, despised by everyone, and had nowhere to call home.After the marriage, she became the heiress who was coveted by many, lavished with love, and had countless brilliant hidden identities.Such a perfect person, the only pity was having a disabled husband.Everyone advised her to kick him out and find someone better.But a few days later, they saw the man who had been in a wheelchair stand up and become the rich and powerful ruler of the Huo Family.He then pinned Nan Yu in a corner, held her by the waist, and with a hint of red in his eyes, and said, “Sweetie, I heard that you want to divorce me?”Remembering his wildness in bed, Nan Yu shook her head violently, “No! Those are all rumors. You are the only one I want to spend my life with!”

A chance to change, to challenge destiny, making dreams a reality, and live a legend! A regular man gains a system that allows him to turn into a fish!