Nanami tries on new underwear in front of the mirror, hoping that her husband will see her as a woman. Oda, a young man from next door, spies on her and is in love with her. One day, Oda goes out of control and forcibly takes Nanami's chastity. Her husband refuses to look at his wife's conflicted state, and she begins to accept her neighbor, who wants to embrace her out of loneliness. She sends her husband off, unaware of her mistake, and today the married woman is once again drowning in the pleasure of infidelity...