Sera in her Wyrm form is simple minded and has become the pet of the Dragon-Girl.
The Dragon-Girl is standing upright and has Sera collared and on a leash.
Sera has her tail like body wrapped around one of the Dragon-Girl's legs and is using the tip of her tail to penetrate the Dragon-Girl's crotch.
Sera's head is near the Dragon-Girl's stomach and is licking the side of it.
The Dragon-Girl is looking down at her pet with a pleased expression on her face and is blushing slightly at the attention she is getting from Sera.