Letting his wife go to the gym was a very wrong decision of the husband, he just wanted her to have a slim, hot body like other women but did not think that it was the catalyst that aroused the lust of other men, typically the gym owner in the movie. After going to the gym for a few days, with the enthusiastic guidance of the trainer who was also the gym owner, her body became more and more attractive but at the same time this was also the time when the gym owner showed his lust and gradually they also developed feelings for each other. Then they were happy with each other every day behind the back of the unfortunate husband while he still believed that she only went to the gym.