"Wow! My sister's ass is amazing! is a particularly impressive work featuring Nana Yagi's attractive ass. The interplay between the two is excellent, as Nana has a very taut, sensitive body and can easily cum. However, in terms of the story, there are no scenes that can be said to have been definitively good, and the film can be enjoyed as a work that specializes in ass. This is a work by a director who knows eroticism, and Ena Satsuki's previous works were also excellent. Overall, Nana's buttocks look attractive in this film, and it is recommended for those who have a butt fetish.