Demonstration tool

"Futaba, you are a sex doll and our class's demonstration tool."

When Ren snapped, Futaba eased herself to the floor, legs spread, mouth in an O shape.

"All right," Makoto said. "Now we can begin."

"What are we learning today, Sensais?" Ann giggled.

"Well," Ren said. "Last week, you learned about blowjobs, right?"

Ann nodded.

"Today, you'll be..."