Anime Crossover: I'm the Demon King and I Picked Up a Wife

I am the strongest Demon King in nearly a hundred thousand years.

But I have a peculiar hobby: I like picking things up.

Picked up a hero 90,000 years ago... Why pick up a hero? I must have been bored out of my mind.

Picked up the Demon God Lucifer 80,000 years ago.

Picked up the Goddess's child 50,000 years ago.

Picked up the egg of the snow dragon, a divine dragon, 20,000 years ago.

Picked up the child of Fenrir, the demon wolf, 21,000 years later.

Picked up the princess of the elf clan 15,500 years ago.

And now I've picked up... hmm, a little girl. What's going on?

This is the story of a great Demon King who picks up a little girl, and ends up picking up a wife.

This novel and its characters are purely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.