Miss Witch's Boss Demon King Protector

[Development system + daily complaints + upgrade flow + system flow light novel] Yis felt very sad. As a Blue Star person, he actually traveled to a stone statue in another world! Or the villain, Gargoyle Ace! Fortunately, he still has a system. "You have unlocked the villain transformation system, please bind a contract with the protagonist." "By gaining the protagonist's trust, you can gain trust points." He was forced to sign a contract with the 9-year-old protagonist Neve, the witch, and gained a large number of trust points in exchange for countless skills. So, he and Neve began the road to invincibility. "Villain? If you want to harm Neve, kill him!" "Protagonist? I'm the villain, kill him!" "Boss? Too weak, kill him!" "Ding, it is detected that you have stopped the transformation. The system will punish you. Please continue the transformation." "Hmph, your little system still wants to stop me from becoming the devil?" "What do you mean he led the protagonist into darkness?"