This time, the target is a girl who is aiming to become a dental hygienist! Mami-chan with the short hair is interested in the topic that a conference has announced that pre-cum and sperm from the male genitals are effective in removing tartar, and we are very successful in getting her to take my big dick in her mouth! The serious-looking Mami-chan takes it deep in her mouth and moves her tongue with all her might, and my big dick gets hard as a rock! It seems her erotic switch has been turned on, as she starts moving her hips on her own and becomes more and more aggressive as we have sex!