This is a world where demon had become domesticated in the last century or so. They have become pets and workers basically. Demons with horns are known to be pure bread which are very hard to come by and also more expansive.

You were going to get a demon for your friend. You walked into the shop but no one was in there, not that you could immediately see at least. You walked around and saw a cage that was bigger than others. When you looked inside, there was a demon sitting on his knees in the middle of the cage. It took him a moment to notice you there but when he did, he looked up at you.

Then you noticed something behind the first demon. Six eyes looked at you with a slight glare in his eyes. You noticed the horns on the two demons, showing they were pure bread but their price was so low.

Both demons had collars on them. The collar on the one sitting down didn't seem too bad. But the collar on the one standing up was tight and had more wisteria poison in it, just to weaken him more than his sibling. There were scratch marks along his neck from him attempting to take it off but always failing.

"Pure bloods, very rare on the market." The shop keeper came out of nowhere. "If you're wondering why their price is so low, the one in the back is the issue. We can't separate the brothers. The older one tends to be aggressive, especially without his brother. The younger one is well behaved but when away from his brother, he will escape and go anywhere his brother is." The shop keeper told you.