One Piece: You Asked Me to Forge a Marriage Alliance, So I Built a Family Empire

[One Piece + more children, more blessings + family + multiple heroines]

Locke was reborn in the world of pirates.

He became a member of the Vinsmoke Family, with Vinsmoke Judge as his older brother.

But he was frail, and the Vinsmoke Family called him a failure. He could only be used as a marriage pawn, and was even made to marry a blind woman.

Fortunately, he awakened the more children, more blessings System. The more wives he had and the more descendants he fathered, the greater the System rewards he received.

So Locke agreed to the arranged marriage, became the son-in-law of a North Blue kingdom, and began building a family empire of his own.

Many years later,

a family-founded empire had arisen in the world of pirates, known as the Locke Empire.

Locke had more descendants than Whitebeard had adopted sons.

He punched the Shichibukai and kicked the Four Emperors.