From source:

Extra-Hot Springs (rajii) - by MysteryMan69

Just because Raiko is small and cute doesn't mean he can't wrap a bigger dog around his fingers. Or a nice collar around a bigger dog's neck! Or something very tight around his knot...

This incredible, mouthwatering, jaw-dropping piece is by none other than the marvelous https://www.furaffinity.net/user/rajii ...That cheetah back there looks familiar...
Go give him all of your love!

Raiko is of course https://www.furaffinity.net/user/raikano

Hot in the Hotsprings - by Raikano

When the springs get too hot for Raiko, it's a good thing he has Jake on such a short leash. The best way to cool down is to slip out of the water and onto the mutt's slick, oversized knot~.

Art and Rajii, getting into trouble in the background. >3 : https://www.furaffinity.net/user/rajii

Naturally, Jake belongs to https://www.furaffinity.net/user/mysteryman69 . He surprised me with this gift and I truly can't thank him enough.

Raiko: https://www.furaffinity.net/user/raikano