Fight to the end inside the goblin's cave (male)

The goblins notice that the training is not working and they try something else.
The training is with the saddle and the whip.

They fit you with a leather harness. A bridle for your mouth and neck forces your head up. Your hands are bound and your legs are left just free enough to move, but not to run.

They lube a wooden plug and they laugh watching your face when you feel the big plug entering your anus. They also puts a very small cage to imprison your clitty to humiliate you.

They lash you forward, making you march like a beast, a rider mounted on your back, and guide you completely blind through the camp.

You resist at first, but after many months, you can't endure more whipping and ****. You start to obey and your life becomes easier.
Also they mix a special potion on your food to make you more docile. However, this foul beverage is filled with magical hormones, and you begin to develop breasts like a woman.

They load packs onto your back, laughing when you stagger under the weight.
Finally, a rider claims you as his personal mount, you feel a sharp pain in your nipples and he attaches nipple rings... now you are bound to him, you have to follow him everywhere, he takes care of your cleaning and feeding.

You serve him until you are too old and tired to be useful and then you are discarded like an object.
This is the end of your story.

Bad Ending: His personal mount ending (male)