Beautiful young bride Mizuki has been married into a long-established inn run by her husband, who now serves as its third generation head. Three years ago, shortly after their wedding, the previous lord passed away, leaving her husband to take over his position. However, despite their best efforts, the business began to struggle financially. Desperate for help, they turned to a major investment firm. On the day of the inspection, two men named Sugihara and Takamoto arrived. They criticized the husband openly, angering him, and even went so far as to throw them out of their room due to their lack of manners. Then, these two men ordered Mizuki, the young lady in charge, to entertain them alone for three whole days...

夫が3代目当主を勤める老舗旅館に嫁いだ美波。3年前、嫁いだ直後に先代が亡くなり、夫がその跡を継いだ。しかし、立て直しは難しくみるみるうちに赤字が増えていって…。八方塞がりになった夫婦は大手の投資会社に頼る事にした。そして視察当日、杉浦と滝本という男がやってきた。2人は小言を並べて夫を怒らせ、マナーがなってないと部屋から追い出した。そして若女将・美波だけで三日間もてなすよう命令してきて…。