How to fall in love with the demon king at first sight

In this era, Eastern gods, demons, and invading vampires fought in melee.A human being was involved in this dispute, found out his own life experience, and harvested a loyal dog demon king at the same time.Content tags: fantasy space supernatural gods and monsters sadomasochistic romance book ┃ search keywords: protagonist: Lu Miao ┃ supporting roles: Tang Xiu; Jiang Dongze; Su Xi; Li Yuntang; Brad; Shi Yin; Yu Guang