Lately, my little brother has started looking at Dad's porn and peeping at Mom masturbating. Unable to bear it any longer, his sister Yuna tries to warn him, but her own sexual knowledge is all wrong, making one feel sorry for him instead. My little brother wants to ask about everything regarding masturbation and sex, so Yuna shyly says, 'This is a secret between just the two of us,' and then starts sex education by exposing her own genitals...
