Bound to Serve: A Slave's Journey Towards Pleasure and Pain

In the hentai anime Isekai Maou to Shoukan Shoujo no Dorei Majutsu, a demon lord named Yuuto is summoned from his world into another. In this new realm, he discovers that he has been tasked with defeating the magical girls who are trying to prevent him from claiming the powerful Crystal of Destruction. Alongside his companion and servant, Lilith, Yuuto must navigate this strange land while also attempting to suppress his own urges towards the magical girls. However, as he continues to fight against these girls, he begins to realize that they may not be the true villains in this story.