Return of the General's Daughter - Chapter 208: The King’s Summons

With unmatched talent, but a fate sealed by a terminal illness, Jeong Yeon-Shin challenges his destined death for a chance to live.Set in a realm where elves and dwarves coexist with martial artists, this is the story of Jeong Yeon-shin, a genius fighting to extend his life against all odds.

A novel revolving around being transported to another world with an op system. The mc spends his day chasing skirts and doing missions to level up. A standard journey to the top with lots of girls from various animes and games with a twist of that gaming feel (hunting mobs, doing missions).

- Description from novelupdates

[Disclaimer: Gore and Mature Content]Kaiser, an orphan, had left Germany to live with his uncle in Lewis Center, USA. Far from his tragic childhood, he befriended five unconventional boys. Together, they hung out, endured boring classes, and faced rejection from girls. Their ordinary lives took a drastic turn when Ben, one of them, was bitten and turned into a vampire by his crush.The revelations kept coming when Yuki, another member of the group, confessed to being a Zodiac—one of the last hunters tracking down Wunders, malevolent supernatural creatures.Kaiser soon discovered a dark world where all his suspicions turned out to be true… And the Mysterienkult was after him. His mother’s tragic death had not been an accident after all.

Transmigrating into a world of cultivation, you find yourself at the lowest rung of the sect's hierarchy. Everyone wants to bully you to gain some benefits. Fortunately, there are always a few junior brothers and sisters who are 'generous and understanding', allowing you to improve peacefully and secretly grow stronger. Years later, unbeknownst to anyone, you successfully become a deity within the sect. This day, your master visits you at the sect's request.'The upper echelons of the sect believe you have been diligent and loyal over the years, and though your strength is mediocre, you are an honest person, so they've found a marriage alliance for you.''An alliance marriage?''Not exactly. The other family has a rule: marrying into their family means taking their surname.'Is this... becoming a son-in-law who marries into the wife's family?