The beautiful wife "hitomi," who is virtuous and gentle, loves her husband "tetsugaku," her former colleague, and lives a life without want. However, her husband is busy with work, and the planned baby-making has been neglected lately. On the other hand, "hitomi" has become more sensitive due to her age, especially her nipples. She finds herself masturbating with her nipples between chores every day. But one day, the situation changes when her husband brings his subordinate home.