477GRMO-132 Human observation, the plain-looking glasses-wearing coworker who seems easy to push over transforms into an ultra-perverted girl with a dick.

After a drinking party, a man missed the last train and ended up at his female colleague's place. He enjoyed her innocent reactions as he forcefully initiated sex, but when she saw his penis, the woman who had always been proper transformed into a nymphomaniac. Overwhelmed by her expert fellatio, he was on the verge of orgasm multiple times, writhing in ecstasy. It seemed that instead of him taking advantage, he was the one being consumed.