Perspective-Golden Pupils - Chapter 159 - : found our killer

In his first life, Victor was lazy, poor, and the ultimate gambler, but the Goddess of Envy gave him a chance.

[ Die and go back four years into the past to restart your life. ]

Victor lost all hope and killed himself, and so began his second and also the most miserable life.

He became rich and successful but soon his girlfriend betrayed him and took away all his fortune, having decided on a desperate act Victor came up with a plan to avenge himself.

Although his plan was successfully executed, Victor hoped that this time he would die once for all and forget the despair that followed him through his two lifetimes.

Yet as if to deny him of his salvation, he suddenly heard a feminine voice once again, but a different one this time.

[ Goddess of Lust, surprised by your actions, grants you a gift ]

[ Yandere system activated! ]

It was a turning point for Victor.

From now on whether it is a Goddess, a Vampire or a Succubus, no matter who it is I must seduce you or I will surely die this time!

He always told me that he dreamed of me at night.

Traveling through Marvel and transforming into a girl, fortunately inheriting the broken godhead of Athena, the goddess of war and wisdom in Greek mythology.

When encountering a crisis, turn into the Goddess of War Wisdom, wear noble and gorgeous sacred clothes, hold the scepter of the Goddess of Victory and the Shield of Justice, form a saint warrior to protect yourself, create a sanctuary, and stand tall in the heavenly city and hell against all invading enemies.

Tear the sky, smash the earth Eighty-eight saints fought passionately for the goddess and the enemy, killing all hypocritical gods and demons who covet the world.

Kyle will lead his saints to the top of the universe, surpassing the five major gods and becoming the main god.

(It’s not too much, ten changes a day, just flowers and a monthly pass. The more flowers, the more motivation.)

- Description from novelbuddy

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.