A trip to the doctor's

After jiu-jitsu, you have some firearms combat, learning the basics of the firing mechanism, and practicing with air rifles. After a quick lunch, however, you're whisked away to the science building, where you find yourself knocking on Dr Kim's door.

"Come in!" calls a high, sweet voice. You enter to see Chae sitting at her desk, and immediately notice a few telling signs. Firstly, the rosy flush of her cheeks and neck, in contrast to her sheet-white chin. Secondly, she's gripping the wood tightly enough for her knuckles to be visible under the skin. Thirdly, there's a steady lapping, squelching sound coming from under the desk.

"Cho, won't you say hi to {if Futa==true}Mikaela{else}Michael{endif}?" suggests Chae, her voice strained.

Her brunette sister's head shortly pops out, her face lighting up as she sees you. "{if Futa==true}Mikaela{else}Michael{endif}, so good to see you! Thanks again for showing me just how fuckable my sister is!"

"My pleasure," you chuckle.

"Now, will it be pleasure or business, {if Futa==true}Miss{else}Mr{endif} Abbott?" asks Chae, as her sister resumes eating her out.

"A little bit of both, if I may," you grin, taking a seat opposite the doctor.

"Ahh - two seconds," Chae begs of you, as she begins to shudder. "Ahhh - ahhhhh - AHHHHHHHHGH!" The young Korean doubles over as she orgasms at her desk. You watch in arousal as she takes several steadying breaths to recover, before walking over and lowering herself to straddle your legs. Her charcoal-black eyes stare lovingly into yours.

"As your doctor, you can trust anything you say to me won't leave this room," Chae smiles, as you feel her fingers nimbly loosening your belt. "My job is to make your life easier, and to make sure you're in top -" she releases your cock; "- physical -" she positions her pussy lips so they're just brushing your tip; "- shape." She sighs as she sinks onto your hard member, embracing the wonderful fulness of it inside her. "How can I help you today?" she asks, as she begins to slowly rise and fall on your shaft.

"Well, you and I both know that my pheromones can make most women give themselves to me in an instant, and make men deferent and obedient," you explain. "But mutants like my teammates seem to be far less susceptible. Do you have a solution?"

"Let me see," hums the doctor, reluctantly lifting off your cock to walk around to her computer. You follow her, taking hold of her hips to line yourself up, and quickly slide back in, enjoying the feeling of her tight passage being cleaved by your living fleshlight. As Chae is looking at the data, her scientist sister rises to her feet beside you, having more-or-less cleaned herself up. She gives a long, passionate kiss first to you, then to Chae, before strutting out the door with a cheerful "Bye!".

"Yes, I think I've got it," says Dr Kim. "There are a few possible options -" her voice catches as you switch rhythm, to long, powerful strokes, which make her small boobs jiggle. "Firstly, we could try to amplify your output. The only way to do that is stem cell therapy, which has limited success. Alternatively, I could try to concentrate your pheromones, and Cho could help design a delivery system for them, such as a dart gun or a gas grenade."

You massage Chae's breasts with your hands, and move your mouth so your lips just brush her ear. "Well, why don't we try both?"

"Mmmm, anything for my best patient," groans Chae, leaning over her desk in pleasure. "All I need for the delivery sample is - ahhhh - a semen sample."

"Better pick up the pace then," you grin, and start jackhammering into the Korean with all your strength. Her body shakes, partly from the physical vibrations, partly from her rapturous rolling orgasms. As tears begin to leak from her eyes, you squeeze her tits one last time and explode into Chae's furnace-like interior, finally allowing her to cum stronger than ever before, and collapse onto the desk. As she lies immobile, you grab a plastic cup from one of the trays on a cart, and collect the spunk that oozes from her engorged pussy.

"Semen sample, as requested," you smirk.