I had a serious and beautiful (English conversation/fitness/cooking) teacher give me an aphrodisiac, and when I showed her my dick one more time, she fucked me so vulgarly that I thought she was a different person.

He invites a beautiful instructor to his home on the pretext of learning English conversation and cooking, and he sexually harasses her with questions, stares at her cleavage, and shows off his erection, but ends up being scolded. So the man secretly puts an aphrodisiac into the drink. Gradually, the aphrodisiac begins to take effect, and her appearance changes, such as her breathing becoming heavy and her eyes becoming dull. When I showed my erection again to the lecturer who was trying to maintain his rationality, his behavior changed completely and he stared at his dick while drooling...