Following a friend's suggestion, Soo-ah embarks on a one-on-one personal training session and diligently starts to learn about exercising. Yet, she can't shake off the feeling of the trainer's water bottle constantly pressing against her lower body. "Coach, could you... um, shift your water bottle a bit?" "Water bottle?" "...Over there... It feels like something hard is wedged... between... you know..." "Ah... this... it's not a water bottle..."