SMSD-014 - Female Prisoner Fantasy: The Ultimate Masochist Actress 'Hana Kanno'

The scene past the midway point, where she's watched by a couple, lying with a bolster under her waist, limbs tied in a spread-eagle position, and a temple monk applies sticky grated yam to her spread legs with a pestle before inserting—it's exceptional! The absolute peak of all the SM bondage videos I've seen.