The Emperor and the Knightess - Chapter 15: Story 3. Getting Used to the New Life.

A lonely soul, which was placed under the care of the Lord Protector’s Manor, ended up having her lover stolen by the family’s eldest daughter and dying tragically the day before her wedding.

Somehow, she was reborn in the family as their 14-year-old first wife’s daughter, Ning Xueyan, with a startlingly familiar face.

Step by step, she will ruthlessly scheme to seek revenge as well as uncover the mystery of her tragic death.

Her former fiancee, the flirty crown prince and the bloodthirsty prince, will now bear witness to a vengeful Ning Xueyan becoming the peerless lady of her generation…

Back in 1998, an ordinary person who has been through, tired, cried, and fought, hopes to run down-to-earth and keep up with the trend of the times.

- Description from novelbuddy

God plucked one of his creations from his first Earth and gave him a second chance in another one of his Earths...surprise it is in DxD! Now reincarnated as a perverted side character how will our poor protagonist handle his new identity? Well he probably wont make the choices you will want him to, that's for sure!

Sivis was transported into the game Gandanyir.In a world where nobles monopolize extraordinary powers while commoners, barely better than pigs and dogs, suffer endless torment, he inherited the title of the Evil God.By continuously slaying enemies, Sivis could earn Soul Points, which allowed him to enhance his monsters.Goblin → Elemental Goblin → High-level Goblin.Skeleton Soldier → Skeleton Mage → Bone Dragon.Stone Golem → Fire Demon → Carved Gargoyle....In order to strengthen his monsters, Sivis started wars, annexed nations, and slaughtered countless nobles and kings.He also casually gathered numerous helpless commoners, bringing them under his domain system, improving agricultural and industrial technologies, ensuring that these people had enough to eat, teaching them to read, and turning them into the creators of his domain's wealth, which he ruthlessly exploited.But... Sivis had two doubts.First, why is it that his subordinates are always bringing him women?First, it was the Saintess from the Church, then a peerless female knight, followed by a princess from the kingdom, a succubus from hell, an angel from the Holy Hall...Second, why, as an Evil God, are countless people calling him the Savior, the Wise King, and the Benevolent Father of all beings???