One day, Mao suddenly gets dumped, saying, "I found someone I like, so let's break up.'' Having lost her love, her home, and her job, Mao ends up working as a live-in at a lovely love hotel that looks like a castle. Adachi, the prince/owner of the love hotel, is a good-looking guy, but he's definitely a zero-tolerance guy! He rains down a storm of harsh judgments on everything Mao does. Mao still doesn't give up, and Adachi shows a surprising side to her... She can't help but melt away at the sadistic man's sudden sweetness!?