This work is presented in a complete documentary format, following Shirase Yukiho—previously known for her low-profile activities—as she steps beyond her ordinary life to confront a long-standing personal curiosity: her first experience with anal. Beginning with anal enema and progressing to anal stretching, the film captures every moment in detail as she gradually succumbs to pleasure, eventually reaching climax with powerful squirting. Witness the meticulous unfolding of her entire journey, marking the true beginning of her new sexual awakening.