Mirei, the saleslady who eagerly promotes insurance, is presented with an exchange condition by Naoh, a young wife. Mirei, desperate to secure the contract, has no choice but to accept the condition. The first kiss between women, the first sexual act... Mirei's body trembles with pleasure! Having become completely addicted, Mirei visits Naoh's house every day, indulging in pleasure and losing herself in the acts.
