Omega Summoner - Chapter 1908 Chaos Starts

Haruto Hayase was a normal high school boy in his third year, living a quiet life until his younger sister, Haruka Hayase, joined the same school. Haruka’s beauty and charm made her the center of attention, quickly becoming the school’s prima donna. But when a notorious gang leader set his sights on her, he did everything in his power to protect her—only to fail tragically. Haruka was brutally assaulted and tortured, and Haruto himself suffered an agonizing death. However, in a twist of fate, Haruto is given a second chance, waking up a year before the events that shattered his life. Armed with the mysterious ‘Debauchery System Slave’, he vows to exact revenge on those responsible. This time, he will use his newfound powers of the system and charm to seduce the loved ones of his enemies. From their mothers, sisters, and lovers to their closest friends, Haruto will make them his. His enemies will suffer as he steals what they hold dearest, ensuring their downfall in the most devastating way possible.

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.

Kawaki, who was born in the dragon vein of a planet (Altana), first met Umibozu who was traveling in the universe, and his girlfriend, Kouka.Later, he came to Earth by accident and met the teacher who affected his life —Yoshida Shouyou.He also met a group of friends. The most conspicuous among the group of friends is a fool with silver hair and naturally curly hair, a short man with purple hair, and a little devil whose catchphrase is “Not Zura, it's Katsura!”Gintama Doujin, not transmigration.

I got drunk during the Annual Alpha Conference and accidentally slept with Anton, the Alpha of the rivaling clan!I managed to sneak out of the hotel so that I wouldn’t embarrass the pack. I told no one other than my younger sister, although I did not mention who he was.The present: Three weeks later, I reached adulthood and was about to take over as the pack’s Alpha. I would be transforming for the first time at eighteen, awakening my inner wolf as everyone watched. I was on my knees, using all my strength to transform… But nothing happened. Had I failed?Not resigned to my fate, I tried again. But that was when my heart hurt as if someone was grabbing it and my belly heated up as the rest of my body screamed in pain… I drop to the floor, unconscious.When I woke up, the first words I heard were from the doctor.“She’s pregnant…”In our world, any werewolf pregnant with children not belonging to their mates were treated as pariahs, oppressed by one and all. I did not dare to look up at my parents, who would obviously be disappointed.“Baby,” said my mother. “Just get an abortion, and we’ll continue the ceremony. You are still the Alpha of our pack.“Ellie,” said my father. “If you don’t get an abortion, you will never be my daughter ever again.As much as I loved my family, I was the only one my child could count on. That was why I decided to leave home.Thankfully, my younger sister managed to get Anton’s number, but the only thing he said over the phone was, “It’s been so long. I can’t remember what really happened.”So, from now on, I would be a single parent to my child! I swore to give him the good life and to help all pariah wolves find a place to settle!Years passed, and Anton was almost thirty. With his father’s insistence, Anton finally found himself a mate… But who could explain why she was so disgusted with him?