Danjo Shichinin Natsu Monogatari (1986)

Danjo Shichinin Natsu Monogatari 1986 / 男女7人夏物語 1986 / The Summer Story Of Seven Men And Women

Travel tour conductor Imai Ryosuke 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 for help, which is the starting point of the story. (Source: DramaWiki)