The Massage Table Bet - Strapped Face-Down, Brush Rollers On His Bare Soles And Behind His Knees (Anime Bara)

He lost the bet, so he goes face-down on the padded massage table. Broad leather straps buckle over both wrists at his sides and both ankles at the foot of the table, his bare feet hanging off the end with the soles turned up and the backs of his knees wide open. Two simple motorised brush rollers roll in on low stands and press straight in - one scrubbing along both upturned soles, the other working the soft skin behind his knees - bristles splaying flat, spinning hard, never lifting away. His toes curl and spread, he hauls at every strap, and his friend just stands there grinning in a towel and watching. All hand-drawn 2D anime bara animation, no real people.