There are so many things you don't know until you live together. Mahiro-san (25), a full-time housewife, is already regretting in the second year of marriage. She started living with her in-laws, and the stress of the family's detailed rules and the frequency of nagging is gradually accumulating. 'Today, I told them I was going out with friends and would be late. I want to experience something that makes me feel like I'm not myself.' The first time she cheated, the first time she swallowed, the first time she was facially... A pure wife with little experience explores her non-daily life in a sex documentary.