Mai, an office lady who is a sex friend of a staff member. One day, she gets so excited about AV that she begs to appear in it! When she hesitates a little, he immediately suggests that she co-star with her sister! Mao, the younger sister, readily accepts her older sister's offer! She is shocked at how low the "AV wall" is!? They quickly take over the studio and start filming! Despite their embarrassment, they soon start competing in an erotic scene! Don't miss the impressive bodies of these tall sisters, both over 170cm tall!