Things: rope bondage, kinda dom/sub. The third kazekage canonically has no name so he's referred to as "San" which just means third. :P

"Now bow."

Sasori's fingertips pricked between the Kazekage's shoulder blades. He shifted awkwardly so his hands fit between his thighs and he folded in half, just holding himself off the ground with his legs.

Sasori leaned down over his back. They had no body heat, no breath to hear or feel, but even so he knew when their face laid beside his. "Good boy," they whispered, sending shivers down San's spine.

He heard wooden footsteps clacking away, spinning on their heels. San breathed heavily. He tried rolling his shoulders to relieve some of the tension from the back of his neck. He knew the rope would leave marks, and come the morning his robes would caress them painfully. The thought of Sasori's handiwork imprinted on him... marking him as theirs, like he's one of their puppets, it made him feel... warm. Loved.

Sasori lowered themself to crouch before the Kazekage. A finger hooked in the gag between his teeth and pulled, tugging it free in a pop of spit. They brushed the drool from the corners of his mouth. San's breath shuddered.

"Open your mouth," Sasori commanded. Lips separated, tongue lolled out. Sasori pushed an object—a familiar wooden dildo—into his mouth.

They didn't know mercy, hadn't for a long time. They pushed in until they could hear San gagging, then grabbed his ponytail, pulled his head up and then pushed it down further. More saliva flowed down over the dildo and Sasori's fist. San felt it on his lips as he thrusted, knew they weren't going to be happy.

The dildo left his mouth slowly. He didn't know where it went, and didn't worry about it. He felt one wet finger on his lower lip. "Lick it off," they said, something like petulance in their voice.

San had to force himself not to smile. He drew long lines up and down fingers with his tongue, sucked on knuckles and made love to their palm.

When it was enough according to Sasori the hand retreated, ghosting over his hair as they moved away. Fingers pinched and tugged at the ropes on his back, then scored down his skin. San whined. Sasori took a handful of San's ass and squeezed in warning.

San felt Sasori's chakra threads—they had a feel, he could swear, like the air before a thunderstorm—before the soaked fabric of the gag hit his lips again. He bit down on it, and it tightened.

San felt the blunt head of the dildo at his back entrance. He shivered in anticipation.

"Well? Don't keep me waiting. Fuck yourself, slut."

San whimpered, then pushed back.