During a nude figure drawing class, Yuka Minase is coated in oil to enhance the three-dimensional expression of her body. However, it is later revealed that the oil contains a potent aphrodisiac. As fingers trace her skin, a growing heat spreads across her body, accompanied by an intense, uncomfortable arousal in her lower regions. Her glistening, sweat-slicked skin reflects the light, her body trembling as pleasure builds uncontrollably, escalating beyond resistance.