A woman with huge breasts enters the small mixed bath of a hot spring! It's so narrow that her skin touches the men's. She naturally becomes a molester, and then it turns into an orgy... Iori Yuki, who is currently known for having the biggest breasts in Japan. A mixed bathing nighttime fantasy set in an open-air bath, where she goes to the rooms of men she met in the mixed bath at night! Mixed bathing is our wonderland!