The Retired Young Mercenary Is Secretly a Billionaire - Chapter 9: A Picture.

“So basically... I'm a Necromancer from my game... in this world?”“...And I'm useless?”“Yeah, right.”---Alexander never expected his dull life to change—until a single message appeared. What seemed like a prank or an ARG from his game became something far more real.He transmigrates.Now, in the body of Asher Morgan, a nineteen-year-old with a lonely past. His plan? Stay under the radar, play it safe, and live like he always had—a gamer, a slacker.But fate had other plans.At Velcrest Academy’s Inauguration Ceremony, where students awaken their powers, Asher receives the worst possible class.“Outcast. Worthless.”That becomes his new name—until fate decides to change plans.The system glitches.—[ERROR… ERROR… Recalculating Awakening Process…][Hidden Ability Detected—Reawakening Process Initiated][SSS-Ranked Ability Unlocked: Sovereign of the Dead][Secret Evolution Triggered—Job Upgraded: Lord of Draconic Souls]—At first, he is frustrated, but then, he remembers....if the old Asher had lived to see this moment, he would have been miserable, abandoned, and forgotten.He reluctantly accepts his fate, ready to prove them all wrong.

【Substitute Marriage+Adorable Baby+Sweet Pampering+Both Leads Pure+Chasing Wife Drama+Anti-cliché+Face-slapping Revenge】A conspiracy, Ivy Kensington marries in place of another to the powerful Master Blackwood.During the day, she is his most disliked humble maid.At night, she becomes his bride, sharing intimacy every day.When the secret of the substitute marriage is revealed, Ivy Kensington takes her child and flees far away, only to be pursued relentlessly by the man: “Ivy Kensington, you can only be mine!”She pleads, struggles, yet cannot escape the cage the man has crafted for her.Four years later, Ivy Kensington returns with a stunning appearance and child, “Master Blackwood, long time no see.”The man becomes a doting husband, pampering her beyond measure: “Be good, call me hubby!”

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.

She had a lifetime of fake virtue without receiving a virtuous ending. In the next lifetime, she controls fates with the flip of her hand. To the jerk who wasn’t faithful, she’ll draw a premature death talisman for him. For the poisonous step mother, she’ll send a death flower. For the step sister who is two faced, she’ll personally rip off that fake pretty face!

But when she personally offered up her body to her nemesis because of a child who she had no fate with, something unexpected happened. The night of the big wedding, the groom changed and a cold and luxurious man pushed her down. “You can marry whoever you like, but you can only give birth to my children!”

- Description from Novelupdates