During their girls' trip to the hot springs, three moms encounter a rude black tourist who doesn't follow proper etiquette. In an attempt to teach him manners through body language, they find themselves caught up in his misunderstandings and are confronted by his massive, dark penis that has become erect. Despite being taken aback at first sight of such a large black cock, curiosity gets the better of them! They can't resist the thrill of experiencing something new and end up losing control, climaxing repeatedly under its powerful stimulation.

ママ友達3人の温泉旅行でマナーの悪い黒人観光客と遭遇する。正しいマナーを教える為に、身振り手振りで交流を図るが、日本語の分からない陽気な黒人達の勘違いに飲み込まれ、勃起した漆黒のメガチ○ポを見せつけられる。初めて目にする黒チ○ポに驚愕するも、好奇心が抑えられない!初体験の刺激に心を奪われイキまくる。