His younger brother, Hiroki, has been staying at his brothers house for a while during the training at the head office where he works. - One day, Hikari, who trains with tight leggings, asks for help with stretching. - Then the seams on her butt cant withstand her butt pressure and tear. - Hiroki, who was frustrated by the continuation of the training, could not suppress the excitement to Hikari who showed the whip butt that was exposed without noticing the leggings that opened suddenly, and suddenly inserted a meat stick that warped against the back.