From a mother of three to a single woman. Sanae Kurihara, 49, experiences her first sexual stimulation. She makes a reservation at a real brothel for women in Tokorozawa or Shinjuku, where a handsome, younger therapist gently stimulates and caresses her clitoris. Kurihara's cheeks gradually flush with the stimulation of her first experience. Although she is modest, she begins to let out sighs and orgasms without any hesitation in front of others.