
A son who can no longer suppress his twisted desires for his mother's stunning curves. Her incredibly seductive hips drive him crazy, leading him to cross the forbidden line. Once the mother experiences the pleasure of being with her own son, she completely loses all inhibitions, falling deeper into a cycle of insatiable lust.
At first, it focuses on her beautiful butt as the title suggests, but once she's down to just black stockings, it's great to see not just her butt, but her beautiful breasts fully exposed as well. There's a wide variety of outfits, lingerie, and stockings worn by Saori Ikuta, and since it's a long work at nearly two hours, I was very satisfied.
It's not listed in the genre, but there's plenty of exhibitionist-style play, and there are some good scenes beyond just the butt. As for the main attraction, the buttocks are truly beautiful as the title suggests—definitely worth a watch.