I saw it in the locker room of the gym. A fitness instructor put on underwear after taking a shower and took out a pair of white thongs. The strap behind the thong is lifted from both hips and stuck, and the sexy and round hips are exposed. He also talked and laughed with the coach next to him, saying that he was not feeling well at all. After that, he only wore this thong to blow his hair in the mirror.