After a recent break-up with her long-term boyfriend, Ayumu Naruse, not yet thirty, is rundown from overwork and a broken heart. One day, she returns home late to find a handsome stranger in her apartment! Clad in a black tailcoat, he says, "Welcome home, Master," as if it were the most natural thing ever. After applying online to be a tester for a new cleaning service for working women, Ayumu is shocked to find that she's been selected... And what's more, a young man - a butler - has shown up for work... His many skills even extend to full-body massages to take away the day's stress, and his touch is more than just relaxing...