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The Dragon's Mouth by fistbumpLETSDOTHIS
Fandoms: ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game)
10 Oct 2025
Tags
Summary
“Oh, I have something planned for you. Don’t even worry.” Tachyon wouldn’t take her eyes off of Opera as she walked up to him and set her materials on the lab table adjacent to him, her back finally turning to work on whatever she had planned for tonight.
She hummed a song that Opera couldn’t recognize as she prepared a bag on an IV pole. His pulse quickened slightly – unable to separate fear from excitement. Opera instinctively searched for the vein running down his arm all the way to his wrist, the sensitive skin itching to be pierced.
His heart skipped a beat when Tachyon turned around to face him with the needle end of the IV tubing pinched between two fingers, her other hand wheeling the pole to stand guard beside Opera.
or,
Tachyon's found herself a fine, obedient little guinea pig. She has some tests in mind.
