Wife Naho lives a happy, harmonious life with her husband. However, her peaceful daily routine is suddenly disrupted by Shimamura, her husband's boss. Shimamura exposes her husband Yasuaki's misconduct to Naho and begins manipulating her into submission. From then on, during the daytime when her husband is away, Naho is repeatedly sexually abused by Shimamura, enduring endless suffering. Feeling pushed to her limit, Naho finally resolves to confess everything to her husband—only to face an unexpected and shocking outcome.