lesbian mizuho has a one-sided love for her brother's girlfriend nako... nako, who is frustrated with her boyfriend's sex, makes masturbation after the act a daily routine... one day, in the room while her brother is away, the two with heightened sexual desire kiss each other without knowing who started it... falling into forbidden lily sex as they please, licking, hugging, and seeking each other... forbidden lesbian sex of a slightly amateur-type girl who reveals her lewd true nature that her brother doesn't know!