FTKD-042 - The quiet nerd in class is a secret bombshell who drags me to the gym after school to satisfy her insatiable urges.

Yamashita is the typical quiet, introverted nerd who keeps to herself. But behind that shy exterior lies a total freak. Once the gym class ends or school is out, she turns into a nymphomaniac who uses her 'research' from adult manga to drive you insane with filthy talk and expert skills. She won't let you rest even after you finish—she'll keep teasing and draining you until you're completely spent.