Nanami's father remarried and Nanami started living with her stepmother and stepsister... Nanami is a secret lesbian and her Nanami throbs at her stepsister's H-cup breasts! She can't help but touch Nene's breasts as she sleeps defenselessly without a bra... Nene, who is both big and has a sexy desire, responds to her cute stepsister's feelings... A lesbian sex story between a lesbian sister and a straight, lewd older sister! Do you like sexy breasts...?