Ria is the new teacher. This summer vacation, she and another teacher will go to survey the location of the tour organization for students. But Ria didn't know that her colleague had noticed her charming body for a long time. He had secretly put the aphrodisiac in Ria's beer, waited for her to enter the sauna, and went in. The drug quickly took effect. Ria faded away to let her naked body groping her colleague. When she woke up, she dreamily followed his words. Ria's body became extremely sensitive, itchy, wanting to use his cock to relieve this itching. And then, he used this to intimidate her, forcing her to continue to satisfy him. But Ria gradually became addicted to aphrodisiacs. She actively begged him, was more proactive in sex, voluntarily obeyed all his perverted requests...