Rei, a married woman who works as an instructor at a certain gym, was planning to spend her first holiday in a long time abroad with her husband. However, her husband, who has no interest in married life, showed no interest at all and decided to go with a friend. A week later, Rei returned home with a tan all over her body. In contrast to her husband who still showed no interest, the students at the gym were transfixed by Rei's tanned body... Rei's personality and sexual desires had become more open during her trip abroad, and she became addicted to the pleasure of being watched, and she boldly seduced the students under the pretext of teaching them...