Nude sketch model smeared with aphrodisiac - Minase Yuuka SERO-0211

During a nude sketching class, Yuuka applies lubricant "to make the body look more three-dimensional." But in reality, it's a liquid mixed with a powerful aphrodisiac! As time passes, Yuuka begins to feel strange sensations in her lower body, and her stretched limbs start to writhe. The inner throbbing pain continues to stimulate and intensify...