When amateur girls attend a close-up massage training course at a men's spa, they aim to learn the techniques to please their boyfriends. While shyly performing a close-up, slippery oil massage on a male model, his erect cock peeks out from his paper panties, hard as a rock! This hard-on rubs against the girls' crotches through their panties, teasing them intensely! And then, he just goes ahead and inserts his cock right through their panties!?