A serious girl with glasses who was raised by an educated mother. A man who secretly gives her an aphrodisiac attacks her while her mother is not looking! The girl resists, but eventually she is made to cum many times, and when the man inserts his penis into her, the effect of the aphrodisiac is multiplied and she becomes lustful. She has sex instinctively as if to release the stress she has been building up, and her hips are shaking non-stop as if she is going crazy!