There are many opportunities for my sister to ride a family’s car: being picked up and dropped off at school or during family trips. Because of the youth her active bladder seems to have a faster speed to produce urine. This work is a record of a younger sister fighting intention to urinate during traffic jam or on the expressway where you can not stop the car and get out. My younger sister in the middle of adolescence and realy embarrassed to say in front of her family that she wants to go to pee, so she will endure the urine that accumulates without mercy while biting her lips. However, she will not be able to hold it and will start wetting her pants in fron of her realtives… Soon a pee odor will begin to drift in the closed space and shameful feeling of wet pants will make her blush.