Looking for that one game where you are a dark lord

[Drae_Park]

As title says, you play as a dark lord who obtained a magical cock ring. And also you train an elf queen to be your slave

 

[Pretentious Goblin]

I don't know about the cock ring, but the other thing could be this or this.

 

[NeonSelf]

Slave Lord by Pink Tea games.
https://f95zone.to/threads/slave-lord-v1-4-1-pink-tea-games.155/