After being favored by her father-in-law Ryotaro and marrying his son Kazuya, Megumi tries her best to fit in and adapt to her new family by diligently doing housework. However, naive and inexperienced, she constantly fails at everything she attempts. She endures frequent sarcasm from her sister-in-law Miki, until one day, when Kazuya is away on a business trip, the previously kind Ryotaro reveals his true nature and forcibly rapes Megumi. Witnessing the act, Miki blackmails Megumi, threatening to tell her younger brother unless she obeys, subjecting her to extreme humiliation and degradation.