A woman named Rina works at a convenience store part-time to help support her family. She's been feeling sexually frustrated due to her lack of sexual activity despite having beautiful breasts. As she gets older, her husband doesn't seem to desire her like he used to. Meanwhile, a man working at the same convenience store struggles to attract women and spends his days working just to get by. He accidentally sees Rina changing through a curtain gap while they were supposed to be just coworkers. Unable to control his arousal, he notices that his penis is fully erect... And when Rina catches on to this, she boldly starts teasing him... From beginning to end, full breast play and creampie galore! An opening to their illicit adulterous sex life filled with taboo desires!

家計を助けるためにコンビニバイトとして働く礼奈はセックスレスで欲求不満をこじらせていた。年齢を重ねて、自慢だったおっぱいを見ても夫が求めてくるような日はなくなっていた。一方、男は女性にモテることもなく日々の生活のためにバイトをしていた。ただのバイト仲間のはずだったのにカーテンの隙間から着替えを見てしまった。抑えられない興奮。見てしまったのはただの事故。だけどチンコの勃起が抑えられない…。そしてその勃起に気づいた礼奈は大胆にも誘惑を始めて…。徹頭徹尾、全編おっぱい尽くし、パイズリづくし！巨乳だけど地味な人妻との背徳セックスライフ開幕！