My House Is a Magic Power Spot ~Just by Living There I Become the Strongest in the World~ - Chapter 41: The Monochrome Girls

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.

Betrayed and butchered by his treacherous best friend, Carlo's soul was consumed by an insatiable thirst for vengeance. Reincarnated into the body of Eduardo, a lowly servant, he vowed to dismantle the ruthless Mafia empire of Marcello Diabolo, the monster who orchestrated his brutal demise.But plans went awry upon meeting Marcello.“You're mine, Eduardo. Why don't you spread your legs for me”Eduardo's resolve wavered as Marcello's seductive pull intensified.“Run, and I'll catch you. You'll never escape my bed” Marcello warned.“I need you inside me, not once, not twice, do it until I break”Torn between revenge and desire, Eduardo's secret threatened to expose him. Would Marcello's obsession endure, or would Eduardo succumb to his enemy's passion?Will Eduardo's quest for vengeance consume him, or will Marcello's fiery passion reduce his resolve to ashes?

I was once asked a question.“How far would you go for her?”“How much are you willing to suffer just for her ?”“Would you sacrifice yourself for her?”I answered“I will sacrifice myself, but at the same time I won't ”Why? He asked“It's simple ” I replied“I'm willing to die 9999 times just for her but on the 10 thousands time I won't die I'll live with her and make her happy ”“Why not a billion times”“It's simple it's because I love her and she loves me, I will live with her after 9999 deaths she needs me and I need her that's how much I love her”“Then die, die 9999 times just for her and save her from this world”“I intend to ”

{Mature Content: 18+}This story follows Liu Yizan, a transmigrator who received his cheat four years after arriving in the new world.On his 18th birthday, Liu Yizan received a system called the Lustful Upgrade System. This unique system allows him to enhance his own and others' talents and techniques using Upgrade Points.But to earn upgrade points Liu Yizan must have sexual intercourse with women and made sure they satisfied.Come and follow the journey of Liu Yizan as he overcomes every obstacle in his path, rising to the pinnacle of the world alongside his loved ones.......Warning Tags: Yuri, Incest, Group sex(Only the MC will be the male.), Netori(MC will take other people's women too.)