Even though there are other wealthy families in Silver Leaf City, the Semen family holds the license for black witches and pleasure businesses. The reason behind this is the "Moonbrook" family from Golden Bamboo City (Capital City).
40 years ago, the Semen family's princess, 'Joya Semen', practiced a forbidden yang cultivation technique. A potent Yang essence gathered in her backbone, where aura circles form from bottom to top.
The person who copulated with her, for the first time, will receive that yang essence, and his body will transform into the shape of a mighty warrior. Also, his face and outer appearance will also transform into good shape.
Joya Semen was married to the current patriarch of the "Moonbrook' family of the capital city. In exchange, the Moonbrook family is supporting the Semen family in all aspects since 40 years.