open your mouth and show me your throat

[misheard]

Title: open your mouth and show me your throat
Fandom: Fate/Grand Order
Character(s): Asclepius, Ritsuka
Pairing(s): Asclepius/Ritsuka
Genre: Smut
Word Count: 586
Rating: NC-17
Warnings: None
Summary: Ritsuka successfully flirts with Asclepius.
Notes:

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Asclepius is hard to flirt with, but not for the reasons Ritsuka imagined.

“I am aware,” he says, pinching the bridge of his nose, “of the health benefits of an active sex life. It bolsters the immune system, lowers systolic blood pressure, and reduces the risk of heart disease.”

This isn’t the response Ritsuka expected when he sat on his lap, but he’ll take it. “Then-”

“But whoever heard of a patient treating their doctor?!” Unceremoniously, Asclepius dumps Ritsuka on the floor. “I thought patients who self-medicate with homeopathic remedies were bad, but you’re on another level!“

“Of course I’m not trying to treat you, that would be silly,” says Ritsuka. “I’m just, um… inviting a friend to join me on a new health regimen I’m trying. Yeah.”

“Ah,” Asclepius says. “Carry on then.”

It is perhaps not the most enthusiastic agreement, especially since Asclepius returns his attention to the medical journal he was reading as Ritsuka rolls up his apron. But permission is permission, and until it’s taken back Ritsuka intends to make the most of it.

Underneath the apron, Asclepius wears a simple pair of scrub pants, the drawstring of which Ritsuka tugs loose. Of course he’s not hard when Ritsuka draws his cock out, but that’s nothing that a few strokes can’t fix.

Asclepius exhales, the sound slightly muffled by his gas mask. Small as the reaction is, it emboldens Ritsuka to lick a stripe down the length of his cock before lapping at the head.

“Have you washed your mouth recently?” Asclepius asks, flipping a page.

“Mm-hm.” He knew he’d insist, so he washed up thoroughly beforehand.

“Any cold sores?”

He flicks his tongue over the slit. “Nn.”

“Very good. You can go on.”

Well, if he insists. Ritsuka wraps his lips around the tip of his cock, mindful of his teeth. He sucks lightly and is gratified to feel Asclepius shudder. He takes his time, slowly working his way down until about half of Asclepius’ cock is in his mouth.

Asclepius pulls his mask off, and Ritsuka looks up to catch a glimpse of flushed cheeks. “Hm… my face started to feel hot, I should check if the filter is working right…”

Ritsuka’s muffled chuckle vibrates down the length of him and makes Asclepius shiver. A gloved hand settles in his hair, stroking idly. The gesture spurs Ritsuka to pass the head of his cock into his throat.

“Ah…” Asclepius’ hand tightens in his hair, and his hips roll in tiny half-circles. Ritsuka relaxes his throat, his nose brushing up against Asclepius’ pelvic bone. “M-Master…”

The sound of Asclepius’ moans spikes Ritsuka’s own arousal. He palms his own cock through his pants, his groan muffled with his mouth full. Salt spreads over his tongue.

“Close…” Asclepius tugs at Ritsuka’s hair in warning, which only makes him suck more intently, more fervently. “F-fuck, I can’t- Ritsuka-”

A bitter taste spills down Ritsuka’s throat. He swallows a few times, pulling back only when he’s taken all he’s been given. His lips are red and swollen, and he licks them clean.

Asclepius pants, gaze fixed on Ritsuka, his medical text long forgotten. “…My heart rate’s certainly elevated, I’ll give you that.”

Ritsuka grins and goes to tuck Asclepius into his pants, only to be stopped by a gloved hand on his wrist. “Huh?”

“You should know, Master.” Asclepius’ eyes are dark and heated. “Before beginning any health regimen, you should consult with your doctor, so they can give you exactly what your body needs.”