Synopsis

Theo Aspel, a weak mercenary adventurer, keeps getting kicked out of different groups. To become stronger, he summons a demon who offers a wish. But when he sees her, his wish for strength disappears.

This demon, not summoned in years, says, “I’ll grant your wish, but you must give me something valuable.”
Theo nervously asks, “W-will you marry me?”
The demon is surprised but agrees, making them husband and wife.
They enjoy a happy married life together, causing quite a commotion wherever they go. This is a slightly naughty story about a boy and a girl.