This is the Noh play MOMIJI GARI (Maple Viewing), by Kojiro. The warrior Taira no Koremochi, hunting in the mountains, meets a noblewoman and her attendants banqueting under maple trees. They entertain him with dancing and wine. He falls asleep then wakes to find the woman transformed into a demon, her true shape. Having been woken in time by the local god of war, he defeats the demon with a sword the god gives him. A short kyogen (comic play) precedes the Noh.