The Cheongdam Gym is open for business as usual today. The crowd is likely due more to the two beautiful members and the one stunning trainer than the popularity of fitness itself. However, these beauties harbor a secret that is more than just a secret: they possess intestinal gas (farts) that can easily knock a person unconscious, threatening life through pure stench alone despite having no toxicity. In fact, it's a common occurrence at this gym for at least one person to lose consciousness whenever they fart for fun or by mistake. All three are currently showing interest in the same man.

Setting aside the trainer, the two students only registered at this gym to follow that one man.