The System Said I Was a Supporting Role

This book has the system you want to read, the beautiful junior sister, the violent and arrogant noble son, the hunting of ancient and ferocious monsters, and a handsome supporting character like me. What? Why are the supporting characters being introduced here, you ask? Why are the supporting characters not human? Supporting roles are also very important! I am a supporting character in this book, maybe I will be the protagonist in the next one! So you guys hurry up and ask the author to read this book so that I can go on to the next one! Wrong! What if this book fails again and the author gives up writing? Please, brothers and sisters, please don't let him pounce! I, the supporting actor, will definitely assist the protagonist in cheating all the way, which will make you enjoy watching... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.