I Have Become Cannon Fodder for a Passerby Villain and Want to Counterattack

Traveling to a world where contract beasts can be contracted, Fuyao, who was originally extremely excited, was told by the system that he could only oppose the protagonist. Are you kidding me? Fortunately, I can strengthen my natural contract skills and contract beasts. Well, since the system says so, I will start my own counterattack as a villain and cannon fodder. Maybe, I can step on the protagonist. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.