In a scientific lab, Cassandra, a redheaded researcher, accidentally stumbles upon a potion that transforms her into a futa. Her new, massive cock tents her lab coat as she explores her new body, stroking it to full hardness. She decides to test her new appendage by inviting a colleague for some 'experiments.' The two engage in passionate, kinky sex, with Cassandra's big cock filling her colleague's eager mouth and tight pussy.