Misaki, whose father is the president of a company, has always been alone despite leading a wealthy life. Her father has entrusted his capable subordinate, Miyashita-san, to look after Misaki! Even though Misaki is confused about living together with the handsome older man all of a sudden, he keeps his calm demeanour and says that "this is just work". But while living together with him, she started to notice her heart racing more for the slightly ditzy and very kind Miyashita-san... A rich lady x capable subordinate's 24-hour heart-racing love!! An age-gap, cohabitation love.