In the middle of a record-breaking summer, I, a college student, rented a room in Yuki's house and stayed there as a freeloader. Yuki was doing her daily yoga routine on the first floor, and when she noticed me secretly watching her, she invited me to join her. However, as she was teaching me, my body frequently touched hers, and I unconsciously got an erection... Yuki was surprised to see me like that, but she leaned over to me with her sweaty body and, with a seductive smile, attacked me...