My Son is a Sexual Monster - Yumi Nijimura DASS-625

Yumi, dumped by her ex-boyfriend for her excessive sex drive, and Takuya, who possesses an extraordinary libido. They meet and have sex. Both confident in their sexual prowess, they engage in a battle for dominance, but Yumi loses. "How can I win…" Seeing Yumi's distress, Takuya's mother gives her the source of her libido—a secret drug. After carefully drinking it, her body becomes aroused, gradually turning her into a wanton woman. The conditions are now equal. Revenge begins.