Sorry, I got way too excited... Natsuki suddenly shows up at the house of the man she's always admired, desperately trying to win his attention by taking care of him. While he's passed out drunk, she takes advantage of the situation and uses her impressive skills to enjoy sex with him. She then meets his older brother, who gives her a thorough physical check-up to see if she's fit to become his brother's wife. Soon enough, the three of them are caught up in a continuous cycle of threesomes.