"Urafuzakeru" is read as "Ribon," and serves as the theme for a new series exploring the depths of human instinct, subconscious desires, and the psychological pleasures hidden within inner desires. For this first installment, G-cup Ruri Sato takes center stage as the sacrificial offering. Witness with your own eyes her torment as overwhelming, whirlpool-like pleasure surges from the deepest corners of her mind.