Oh no, I've gone in... Am I going to get scolded!?... Hey, my sister is moving her hips on her own!? At the brothel, the classic 'naked thigh'! A sexual technique where the entrance of the vagina is gently rubbed against the penis to please men, but in fact, the clitoris is stimulated even more than the male genitalia, and the woman feels even better!? Just 'naked thigh' isn't enough to endure! There's a secret, top-secret SEX at the shop!