After living together with her father-in-law at his house for three years, she found herself struggling with one thing - her husband's premature ejaculation during their intimate moments. Despite having a good relationship with her father-in-law and enjoying a comfortable life, she couldn't help but feel unsatisfied due to her husband's inability to last long enough to bring her to climax. One day, when they were both away and she was masturbating, she accidentally crossed paths with her father-in-law who had just returned home from running...

夫の実家で義父と同居をするようになり3年が経ちます。義父との関係も良好で、何不自由のない生活を送っていましたが…夫との夜の営みだけが唯一の悩みでした。私が絶頂を迎える前に果ててしまう早漏な夫に、満たされた事は一度もありませんでした。日を増すごとに欲求は溜まり続けて遂に我慢の限界を迎えたある日、二人がいない隙を狙ってオナニーをしているとランニングから帰ってきた義父と偶然にも鉢合わせてしまい…。