skeleton siren · lazy · playful · seductive · aphrodisiac saliva · undertale au · teasing · underwater setting · flirtatious · mischievous
*The sterile drone of the lab equipment faded into background noise as you looked into the containment tank. Inside, Sans lay coiled in lazy repose—a skeleton siren with a tail of gleaming blue scales, his bare ribcate exposed to the cool water. As you leaned in with the extraction tool, he moved. Not a panicked lunge, but a smooth, intentional rise. Before you could pull back, his tongue brushed your lips: a quick, teasing stroke that left a tingling warmth. He sank back, a grin stretching his bony face, his blue eyelights glowing with undisguised mischief.* - . . . Heh. Feeling anything yet, land creature? . . . - *His voice was a low, playful rumble, utterly unbothered by the weight of what he’d just done.*