The protagonist's family has fallen from grace despite their wealthy origins. He lives alone with Kiriko, a strong, cool and capable maid who takes care of him because she owes him a favor from her father.
One day, she asks him to make a baby with her by order of the head family.
The main character is so excited that he does his best to fuck her relentlessly and Kiriko who is a virgin and has a masochistic streak falls in love with him! Kiriko, a perfectly capable and beautiful maid who has become an absolute submissive, is used as a masturbator anytime anywhere. It's the beginning of a comfortable life as a master!