Royal Pet: I Have a Hell

[Royal pet + hell system + horror + cute pet + upgrade to fight monsters + no female protagonist in the early and mid-term (maybe single female protagonist in the later period)] In this extraordinary world, human beings are frequently troubled by disasters from beasts, demons, and ghosts. For this reason, human awakeners, mainly pet masters, were born. Setting: The demon clan restrains the ghost clan, the ghost clan restrains the beast clan, and the beast clan restrains the demon clan. Depending on the energy of the pet, the pet master can contract different numbers of monsters, ghosts, and beasts of different qualities. However, the strongest pet master only has nine pets. And our protagonist Gu Yuan directly awakens to the hell system. Every contracted royal pet is a demon that has been suppressed and banned in hell for many years. The entire hell level is the home of Gu Yuan's royal pets, and Gu Yuan is the master of this hell. Each level of hell provides one master pet, for a total of eighteen master pets. Small theater: "Gu Yuan, hand over Hanyue Lynx and spare your life!" "Gu Yuan, no matter how powerful you are, we have three thousand pet masters and more than 20,000 pet masters here. Why don't you just submit obediently!" Gu Yuan looked at the three thousand pet masters and more than 20,000 pet masters in front of him, and smiled, "Are you comparing the numbers with me?" "Eighteen levels of hell, all open!" Gu Yuan opened the door to the eighteenth level of hell. In an instant, the entire sky became extremely dark, and tens of thousands of demons walked out of the door of hell.