Kiwako Oikawa is a dominatrix, a beautiful woman with a captivating, alluring aura. Ever since she was young, she's had a strong sexual curiosity. Intrigued by the anal play that brings masochistic men to orgasm, she decided to try her hand at filming the "Extreme Anal Expansion" series. This time, the theme wasn't just the usual anal opening, but also the "deep intestines"—that is, the depths. She prepared two extra-long dildos, measuring 40cm and 60cm. Given the length and thickness of the 60cm dildo, she figured she'd be able to insert it halfway through. First, she began with the classic method of loosening her anus with her fingers. As you'd expect from anal sex, her anus is incredibly flexible, and she quickly swallowed two fingers, allowing her to insert a vaginal vibrator. Next, we carefully examined her intestines with a transparent speculum, then attached an attachment to a vibrator to check her anal sensitivity. Kiwako, a cool beauty, moans sparingly, but her anus is clearly sensitive. Finally, she tackles the main item of the series: a long dildo. First, she slowly inserted a 40cm dildo. Despite hitting the intestinal wall several times, it dug a tunnel inside her intestines and was able to slide all the way in. Now, she had no choice but to try a 60cm super-long dildo! Just holding it in her hand, it was clear that it was significantly thicker, longer, and heavier than the 40cm one. While grimacing at its sinister appearance, Kiwako slowly and surely accepted the deadly weapon into her anus. The surface of her abdominal skin squirmed, revealing the tip of the dildo moving inside her intestines. Watching with bated breath, Kiwako eventually managed to get about 90% of it inside her ass. However, there was one final obstacle... a bulge the size of a fist at the base. After several attempts, there was a loud pop and the super-long dildo was completely buried inside Kiwako's intestines! This is a must-see work that truly showcases the pinnacle of anal sex.