Mercenary System: I can increase innate potential ! - Chapter 180: That’s war!

Drugged one night by her ex-boyfriend, a mysterious man took advantage of her in an ecstatic night filled with sex.To take her revenge, she married the man, and used him.

Fujii Itsuki unexpectedly found himself in Konoha on the night of the Kyuubi rampage.Although it was a dangerous situation Itsuki still survived.His Isekai life was as dull as it gets, he didn't have any talent for being a shinobi nor did he have a system.Itsuki was prepared to live his life as a lazy bum but unexpectedly he received a summons from the Third, only to find out a piece of shocking news.“ Itsuki I have arranged a marriage for you, the other party is Uzumaki Kushina, I hope you will agree to this marriage ”Facing the request of the Hokage, Itsuki could only reluctantly agree while apologising to Minato who died a few days ago.It's not like he wanted to steal his wife but he was threatened into it.'Sorry Minato, But don't worry I will raise Naruko like she is my own child and take care of Kushina well, and never let her feel any loneliness'Itsuki's seemingly ordinary life was turned upside down due to a single event.

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

In a galaxy ruled by warlords, guilds, and ancient tech cults, Kai Zareth is just another debt-ridden scavenger—until a legendary system descends upon him.“One Trader per 10,000 light years. One chance to rise.”Selected by the Cosmic Trade Nexus, Kai becomes the sole wielder of the Galactic Exchange System, a multidimensional platform that allows him to buy and sell across parallel worlds, forgotten realms, and alien civilizations.With only 12 hours to complete his first trade—or lose everything—Kai scrambles to make deals in a universe where information is power and one wrong barter could cost your life.From selling enchanted goblin toothbrushes in toxic slums to outwitting rival system users and forging alliances with forgotten races, Kai must build his empire item by item, realm by realm.But in a galaxy where traders kill for profit and system users are hunted like prey, being the Merchant Sovereign might be a bigger curse than a blessing.