I’m a Captive in the Realm of Demons

The demons invaded and the humans were defeated. The male protagonist Ichiya and his childhood friend Taozi, became prisoners and were escorted to the devil’s lair, where humans were used by demons as laborers, experimental tools, and even food. With his witty mind, Yi Ye dealt with the four major demon masters and got the protection of the demon queen Monqier, but on the condition that he must fall in love with the demon queen and date her??? (Source: Bilibili, translated)