Investment Return System, Start by taking Demon Empress as a Disciple - Chapter 193: Saving Fifty, Spending Five Hundred

Reincarnated and traveling to another world, Eiji Seiya initially thought the world was normal. That was what he thought before he met the heroine and protagonist of the franchise he had watched in his previous life.Not only that, after he awakened the Inner Voice System to grow strong by complaining about plot, heroine and protagonist in his heart to get many rewards.He is determined to increase his power so that he can save his home world, the world where he was reincarnated that was hit by the disaster “Honkai” and save beautiful girls like Kiana, Mai, Bronya, Rita and others who had tragic endings in the original works!“I will save them all!”However... Everything went smoothly... Eiji earned rewards every time he changed the plot in another franchise.It's just that... What's wrong with these heroines?Lala Satalin Deviluke who was supposed to be engaged to the protagonist instead became his fiancée.Sona Sitri suddenly called him to the student council office and said she wanted to make a deal with him.Rias Gremory who was supposed to ask the protagonist for help to solve her political marriage problem with Riser Phenex inexplicably came to him.The girls were disgusted at the protagonists of their respective franchises.Something was wrong here!Not only that, heroines like Kotegawa Yui, Sairenji Haruna, Akeno Himejima, Kuroka, Serafall Leviathan, Grayfia Lucifuge, Sakurajima Mai, Ai Hoshino, Kasumigaoka Utaha and others...They like him!All the super beautiful and sexy women that many men in the world covet surround him and leave their respective protagonists.Grayfia even betrayed her husband.Eiji who saw all this was dumbfounded.At first he was confused as to why these heroines were surrounding him, but gradually he realized and knew that it was all happening because ...His inner voice!The plot that has been changed by the MC:To Love Ru: 83%Highschool DxD: 82%Shinmai Maou no Testament: 92%Oregairu: 89%Saekano: 84%Oshi no Ko: 100%Rascal Does Not Dream Of Bunny Girl Senpai: 100%Mieruko-chan: 89%Trinity Seven: 38%This is the plot change process of the latest chapter and will change as the story progresses.By the way, the grammar at the beginning is bad and will improve as the chapter progresses. However, my writing style will not change much because this is an inner voice novel, which means that there will be many reactions from each character.Oh and in chapter hundreds there will be a group chat to prevent the loss of interaction between the heroines. It's a special chat group for the heroines in the MC's harem.

I became a side-character who died in anguish because of her good-for-nothing husband.

If I can’t avoid getting married, why don’t I change who I marry instead?

“Excellent, marriage sounds good.”

“Wise choice. Then let’s have a wedding ceremony that isn’t too ceremonious. Following that, I’ll need you to go down to the Fief and behave like the lady of the house until I call for you. Naturally, there won’t be any time to spend in leisure whilst dousing yourself in luxuries.”

“I’m not marrying you, but your father instead.”

“……Pardon?”

“I’m not going to marry you. Do you have a problem with that?”

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

The end of the world has come, the world order is in chaos, and human morality has declined.Li Yu, a cold man, was reborn and won a 30-million bonus at the start of his new life. He built a god-level base and hoarded resources.While others were struggling on the brink of starvation to death, Li Yu was enjoying himself on the rooftop, having a barbecue and drinking beer.