A close-knit brother and sister, out shopping, find themselves at a mixed-gender hot spring after a decade! "I won't get excited even if I look at my sister's tits," he says, but when they're washing each other, his brother gets a full erection and reveals he's still a virgin (;^_^) The big-dicked virgin brother gets turned on by his beautiful sister's body, and even though she has a boyfriend, she inexplicably blushes and gets aroused too (;^_^) They end up having raw, creampie sex and lose their virginity together in this special episode.