Just Reborn as a Demon King, and Now I'm a Little Girl's Pet?

Xilie, reborn as a Demon King, somehow ends up in a lower plane as the familiar of a little girl?

He must be planning to fill her head with all sorts of strange ideas.

After all, adorable little girls are meant to be showered with cuteness.

So how can the Demon King lead a little Saintess into darkness?

Little Saintess: Y-You... what are you going to do...?

Mature Sister Nun: Oh dear, don't treat your big sister like that.

Cat-Eared Maid: Master, what would you like me to do?

Goddess of Life: After all these years, you're still the same.

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