What's wrong with having a large harem if you're the emperor of the ninja world?

In a world of ninjas, Di Yan is reborn as the least favored prince of the Fire Country's daimyo. With a ruthless determination, he eliminates his competitors, sparking a chain reaction of conquest and unification. He systematically destroys the five great ninja villages, including Konoha Village, and launches a war of annexation to unify the ninja world. Proclaiming himself emperor, Di Yan sets a precedent for a unified ninja nation. Through an advanced communication system, he gains access to the abilities of his female ninja allies, allowing him to copy their skills and level up. By engaging with powerful female ninjas, he acquires the Sharingan, masters the art of illusion, and obtains the Byakugan, making him an incredibly formidable force. As he rises to power, Di Yan's vast and diverse harem becomes the instrument of his unyielding ambition, fueling his pursuit of a unified ninja world.