Dwarfsoft - Muchimuchi Dekapai Mara Gui Maou-sama to Onboro Yojouhan Dousei Seikatsu

You are a boring corporate slave in a certain company.You are fat and virgin, living in such a rundown apartment alone.
The only upside is your strong sex drive but you do not have enough
money to wear and look rich nor to go to a whorehouse.

One day, however, a change comes to your life.

"Such a cramped place. They guessed it right that this is a nest of a primitive species."

When you roll into bed, you are overwhelmed by an explosion of light and sound.
Then, while you are surprised, you find an unfamiliar woman right before you.
She is so beautiful that you have never seen such a well-proportioned face and body.

The beauty, who self-claims to be the demon lord, shows a bewitching smile
and then pushes you down as she explains that you have a lot of magic.
Grabbing your rock-hard penis in her hand, she says she will suck your
semen out in order to refill her magic and eventually get back to her world.

Thus, your days with the sexy demon lord in the small apartment begins.