[Commission] Sam's Training (Pixiv Fanbox)

Meet Sam, an adorable rubber pony in the early stages of training at the hands of his sensei! It looks like the horny boy is still getting used to standing at attention, and it's hard to tell if his wobbly legs and whimpering are due to fatigue or arousal ^^ I'm sure he will make an excellent rubber slut, and if the leaking from his cage is any indication, he'll enjoy the training even more than his master will~