Hiroki, the younger brother, is staying with his older brother and his wife for a while while undergoing training at the head office of his new job. One day, Hikari, who is training in plump leggings, asks him to help her stretch... But the seam on her buttocks cannot withstand the pressure of her buttocks and tears. Hikari shows off her plump buttocks without noticing that her leggings are wide open. Hiroki, who is frustrated by the training, can't contain his excitement and suddenly inserts his rock hard cock...