When Mirei, a saleswoman, enthusiastically recommends insurance, Nao, a young wife, offers a tradeoff. Wanting the contract at all costs, Mirei has no choice but to accept the terms. The first kiss between two women, the first sexual act... Mirei's body trembles with pleasure! Completely addicted, Mirei visits Nao's house every day, devouring pleasure and indulging in the act.