It Makes Sense for a Cute Girl with a Contract to Scare the Ancient Evil God to Death, Right?

[Beast Control] + [Refreshing Article] + [Fast-paced] + [Frightening Invincible Flow] + [Infinite Growth] + [Multiple Heroines] + [Yandere] Jiang Yuan suffered from mental illness since childhood and could see strange things that ordinary people could not detect. After accidentally traveling to a world of beast control where the strong are respected, and gaining mental strength that far exceeds that of ordinary people, he considers himself a waste with no talent for beast control. Until he awakened to a contract, he thought the contract had failed, but unexpectedly made an exclusive animal pet. But he never expected that the royal beast bound to him would actually be his silver-haired sister, whom he depended on for life. "Brother, I finally see you." "Fight alongside me!" The awakening is over, looking at the crazy people in the audience? "No, she's so cute, why are you so stupid?" At this point, the ancient dragon emperor, the immortal phoenix, the chaotic void kun and other top beasts that had taken the initiative to sign a contract with Jiang Yuan were all quietly strangled in their cradle by her. Facing his indescribable sister, and seeing the ancient beasts that were frightened to death one after another, Jiang Yuan felt miserable, so he could only pretend to be pampering, and promised that he would never contract with another beast. But other people's beast pets showed their domineering power and reached the peak of battle. My pet beast was possessive and possessive, and its sanity dropped wildly. Unwilling to do so, he decided to wander crazily on the verge of death. Now that you have traveled to the world of beast control, who doesn't want to conquer cool and powerful top-level beast pets? Weird Cthulhu? I avoid her edge! Jiang Yuan kept testing his sister's bottom line, and finally came to a bad ending. …