This is Mistress Nina-san.

This is Nina-san's lover, Meguno-san.

Of course, these two are extremely well endowed futanaris.

Couple of futanaris can exchange dominant and submissive roles and enjoy both ways!

And this trap is their onahole and toilet, Sunao-kun.

Onahole

Toilet

But usually they call him Chuu or Chuu-kun, because they don't bother to remember the right reading of his name.

Sunao-kun is an onahole and a toilet, so his duty to take loads from his Mistresses' dicks into his mouth or butt without spilling. If he spills it, he'll receive severe punishment. But, even if he doesn't spill it, he'll receive punishment regardless.

Sunao-kun's vigorous dick has no actual use, Mistresses tenderly treats it as a switch, which makes him burst out crying with a good scream if you torment it.