A man next door becomes aroused by hearing his neighbor's moans, leading him to become sexually excited. He asks his married friend if she too is turned on, and she confirms that she is. As they continue their conversation, he begins masturbating at home while watching her perform oral sex on him. She then transforms into a perverted woman, losing control of herself and reaching climax in his modest apartment.

隣の部屋から喘ぎ声で発情した男。女も発情するかもと世話焼きのママ友で確かめる。すると、喘ぎ声に触発され男の家でオナニーをし始める。さらに股を広げチンポを求めフェラ。変態に変貌した女は安アパートの男の部屋でイキ乱れるのだった。