Usually presenting herself as a dominant queen, Kikako Oikawa is known as a seductive and mysterious beauty. Since her youth, she has possessed intense sexual curiosity, strongly drawn to anal play and the masochistic pleasure it brings—prompting her to take on the challenging "Anal Limit Expansion" series. This time, the theme isn't just widening the anal entrance, but extending deep into the inner rectum. The tools prepared: ultra-long dildos measuring 40 and 60 centimeters. The 60cm dildo, massive in both thickness and length, was thought by many to be only partially insertable at best. Starting with finger stretching to relax the anus, Kikako demonstrates the flexibility of an experienced anal sex enthusiast—easily taking two fingers and smoothly accepting a vaginal vibrator. Next, a transparent speculum allows a careful view inside the colon. An electric vibrator with anal attachment tests sensitivity. Even with her cool, composed beauty, Kikako's restrained moans reveal deep responses from within her ass. Then comes the main event: the long dildo challenge. Slowly, the 40cm dildo is inserted, repeatedly pressing against the intestinal walls until fully buried to the base. Then, moving to the 60cm dildo. Just holding it reveals its immense thickness, length, and weight. Smiling wryly at its sinister appearance, she gradually takes it into her anus. The skin of her abdomen bulges and writhes, visibly showing the dildo's tip moving deep inside. Watching in breathless awe, nearly 90% of the toy disappears into her rear. Yet the final obstacle remains—the flared base, as large as a fist. After repeated attempts, a loud pop echoes as the entire 60cm dildo vanishes completely into Kikako's intestines. A must-see masterpiece showcasing the ultimate in anal devotion.