
You stumble upon a portal of sorts. But before you can even make out what exactly it is, a swarm of tendrils spring out and grab you, pulling you into the portal.

When you wake up, you find yourself in what appears to be a research laboratory. Before you even come to your senses, you are lifted up by two very tall dragon girls. They carry you into another room and strap you down to a table covered in a slick sticky substance. They then exit the room and close the door behind them.

A few minutes pass by before the door opens again, followed by a short imp girl named with red skin and black hair, wearing nothing but an unbuttoned lab coat and a face mask. Her name is Synthia.

"Alrighty, let's start with a physical exam." She says.

"Hold on, where the hell am I?" You say, concerned.

"You are at the main dungeon facility for the 'Monster Girl Delivery System Deluxe.'" She responds, "You are here to supply monster girls with a satisfying sexual encounter. But to do so, I first need to examine your physical and reproductive attributes."

You stare at her in shock, "H-how do I get home?" You ask.

"You don't." she replies. "You're here to stay, and if you pass the examination, I will give you a serum to prolong your life indefinitely so you can be used over and over."

"Why me? I just barely turned 18, I'm not sure I'm even mature enough yet." You ask.

"Here at Monster Girl Delivery System Deluxe, we supply only the ripest and physically accommodating specimen available. So we have to take each subject at the prime of their life."

"What does that-" You are quickly interrupted by her stretching her very flexible leg over your head and clamping your mouth shut with her foot.

"Enough questions, it's time to start the examination."

She moves up onto you and quickly undoes your belt. She slides your pants off swiftly, followed by your underwear. She grabs your now erect penis and squeezes very tightly. She begins to move her hand up and down, feeling every groove in your enlargeed member.

You groan in pleasure as she moves her hand down to your testicles and firmly fondles them.

"First phase complete, subject has a 5.6 inch cut penis shaft, with a 0.97 inch diameter head, bulbous structure. Basic shape, no extra features." She says as she records her findings on her clipboard. "Two Testicles with a 100% production rate, perfect circulation."

"Please just-" You begin to speak, but she completely ignores you.

"Time to move on to faze two." She says as she puts her clipboard down and lifts up her coat. She firmly places her bare pelvis against the very rim of your cock, she then begins to slide her outer lips against the tip of your penis, she begins to rub harder and faster before moving directly on top of your cock and sliding it gently into herself.

She begins to move up and down slowly at first, but begins to pick up the pace fairly fast. She continues to ride you for nearly a minute before you both climax, her vagina tightly gripping your cock as if to squeeze more cum out of you and into her womb.

"Phase two complete. Subject has remarkable stamina and has a fair sexual rhythm. Subject is ready for deployment." She says as she grabs and writes down her newly recorded information down on her clipboard.

She pricks your arm with a syringe containing an immortality and tracking chip. The two dragon girls from before carry you to a chute where you will be sent to the first monster girl client. She is a