The Ultimate Exchange System

When a wretched otaku complained about how weak the demons in the Ultimate were, a natural opportunity allowed him to be reborn into the Ultimate world, and with an exchange system, he was reborn into a small aristocratic family in the demon world. Let's see how the protagonist fights to make his own way in the devil world where strength is the most important and blood is more important than blood. I am a newbie, so I still need your guidance in many places, thank you! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.