A producer plans a shoot with Sayuri Hayama, a celebrity friend and exclusive actress, making her 'big ass' the main character. This is a documentary project that subtly emphasizes 'anal' from the package photo shoot and unlocks "first anal sex"! When her ass is spread open, while making her pussy cum with a toy, occasionally inserting 'anal licking' and 'anal play' to check Sayuri's reaction. When the excited actor greedily licks her untouched virgin anus, a particularly loud moan echoes. Sayuri, whose nerves are heightened by shame and an unknown pleasure experience, orgasms as her anus is dug into with the tip of his tongue! Sayuri, who accepted the tongue insertion into her anus, which is like a forbidden act, was gradually drawn into the world of anal pleasure... A man who plans to insert his dick into her virgin anus as if flowing from the missionary position. However, it seems Sayuri is still not mentally prepared... The man's piston, while making her pussy cum and waiting for the right moment, heats up more and more. A man who is very interested in Sayuri's anus, which has relaxed with orgasm, tries finger insertion. While bewildered by the first insertion sensation, which is different from her pussy, Sayuri orgasms with anal ejaculation when her fingers get used to her anus! The man, encouraged by this, inserts two fingers and, convinced that it's a "good hole," proceeds to insert a toy! Sayuri, who has a toy thrust deep into her in a cowgirl position, orgasms in her anus as if it were natural! Finally, when she finds a spot in her anus that feels good, she transforms into a super pervert, shaking her hips herself and going to meet the toy! The anus, which has begun to function as a "second pussy," accepts the dick fully inserted to the base, and finally reaches "simultaneous fucking of two holes"! This is a great success story that fully records Sayuri's full course to anal creampie, screaming with a beastly voice as two dicks go back and forth through the "wall of flesh" one sheet apart!