After Stealing Hero's Mother, I Reincarnated in the Fantasy World! - Chapter 7: System’s explanation

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.

After a period of 10 years, he now has time to freely recover. Having trained until he had excellent military and martial skill, he sweeps through various military districts and returns back to his hometown. Under the monitoring of a beautiful female cop, he re-establishes his family’s bodyguard service, protecting beauties and moving unhindered, his achievements causing the fame of his outstanding, god-level bodyguard service to resound across the world!

- Description from Novelupdates

Kyoukai Senjou no Horizon chronicles the story of a futuristic civilization returned to Earth after constant warfare hindered them from traveling beyond the post-Apocalyptic Earth. At this stage, a small archipelago called the Divine States were the only hospitable land on Earth. In order to regain the space-faring technology they had lost after many years of war, they decided to recreate history with a book called the Testament as a guide.

It is the year 1648 in the Testament Era. Toori Aoi, Chancellor and Student Council President of the only academy on the airborne city-ship Musashi, faces the ten-year anniversary of the death of his childhood friend Horizon Ariadust in an accident. As he prepares to celebrate the occasion by proposing to P-01s (an automaton who looks exactly like Horizon) he discovers that his suspicion about P-01s’ appearance actually has a basis in truth; P-01s is in fact Horizon Ariadust, reborn into a robotic body. In addition to this, Horizon’s emotions had been stripped away and are now stored in eight powerful weapons called the Mortal Sin Armaments; which are now in the possession of key people in various established countries in the Divine States.

To retrieve the emotions of Horizon Ariadust, Toori Aoi along with his friends and allies begins a crusade against different obstacles as key events in history are recreated in a futuristic manner.

In a world where strength reigns supreme and only the strong are revered, conflict and injuries are commonplace.

Qin Ran was kidnapped and sold by a human trafficker to the countryside at the age of three. The Qin family found her back half a year ago, but because they had taken a liking to their foster daughter, Qin Xue, and refused to let her suffer grievance just because Qin Ran had returned, they continued to let Qin Xue occupy the main bedroom, learn the piano, etc. Meanwhile, the real daughter, Qin Ran, could only sleep in the maid’s room on the first floor. Because Qin Ran refused to accept Qin Xue’s out-of-season clothes and wore a second-hand bag, she was labeled as being insensible. Since then, her mother never bought her another piece of clothing. The Qin family even strictly warned Qin Ran not to harbor any thoughts for Qin Xue’s fiance, Fu Li.

Later on, Fu Li was involved in a car accident that resulted in high paraplegia… Qin Ran’s mother said, “Xiao Ran, our family has a collaboration with the Fu family, so we can’t turn on them at a time like this. Although the engagement was for Qin Xue, you’re the real daughter of the Qin family. Madam Fu has been understanding and agreed to let you marry into their family.” Her mother even said, “Why aren’t you happy? The Fu family is rich, so if you marry into their family, you can be a young madam and enjoy life. Isn’t that great? Regardless, we’re trying our best to give you a better life than before!” But Qin Ran said, “I’m pregnant. Also, I’m severing ties with all of you from today on.” The Qin family was enraged, but they refused to believe that a brat like Qin Ran would really give up the Qin family fortune and sever ties with them.

No one expected Qin Ran to leave the Qin family with such a resolution. She then found her baby’s father and became the wife of the legendary bigshot, Mo Chi. The top-class bigshot thought he had married an inexperienced and pitiful girl with a sad past, but then… She defused bombs with her bare hands, possessed miraculous medical skills, and was highly trained in martial arts… Mo Chi was baffled. “What else don’t I know about you?”