Travel tour conductor Imai Ryosuke (Akashiya Sanma) wakes up one morning to find a woman he doesn't recognize sleeping in his bed. Imai has absolutely no memory of how she got there, only that he had passed out drunk the night before. Quietly, Imai climbs out to his veranda, and calls his friend Nogami (Okuda Eiji) for help, which is the starting point of the story. (Drama Wiki)