My cousin, who returned from overseas, came back to Japan for the first time in over a decade to study for her entrance exams, and I decided to let her stay at my apartment where I live alone for a week. Having lived in a tropical country for a long time, she was used to going without underwear, and she said, "Panties make me sweat," so she left her pussy completely exposed under her skirt. Sensing my gaze as I secretly stared at her pussy, she spread it open to provoke and tease me.