Prince Killua Rage

Legend has it that a prince ones ruled a vast part of the earth,but did they know that it wasn't just a legend.
Prince killua was known to be a man of few words and kills for any slightest mistake than but happens when the cold and ruthless prince buys a slave and start having feeling for her but doesn't last as she is killed for getting pregnant for her master
For this reason the prince made sure no slave should ever get pregnant for this master.
For the rage of having his love killed he became a monster and built a wall around his heart never to fall in love, but fate has another thing instored for him when he buys a new slave .
And he treats her differently from this other slaves and this makes his other slaves treat her badly ,and even gave her a pill to get pregnant what