Another smut warning!

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While the demon gathered his wits, Seonghwa rushed up the stairs and into his room. He retrieved the wooden casket with his instruments from beneath the bed and left with it tucked under his arm. They were loyal companions of his, those items. In the time he trained his body to accept penetration as something pleasurable so he could comply, even if his husbands forced him, they taught him like he promised to teach Mingi.

When he returned to Mingi's dark room, Seonghwa announced himself so Mingi wouldn't startle. The demon shifted on the bed, making space for him to crawl back to his side.

Seonghwa opened the box and felt around in it blindly, knowing the contents by heart. When his fingers grasped the intricate vial with oil, he put the rest next to the pillows for later.

"Did you ever use your fingers on yourself?" Seonghwa asked as he opened the cork. Mingi hummed in the dark and his deep voice had Seonghwa's gut spark with arousal.

"I tried it before, yes, but I never did it right."

"Then I'll show you how to do it and you practise on me; how about that?" Mingi didn't need to see. His body knew what it craved.

Upon Mingi's shy nod, Seonghwa helped him to slick up his fingers and did the same with his own. This time, when they scooted closer to press against each other, their bodies aligned and Mingi's massive size dwarfed Seonghwa. A shiver of exhilaration travelled from one into the other when their lengths ground together.

Lips locked, Seonghwa felt for Mingi's backside. The demon did the same, gingerly spreading Seonghwa open with one hot palm as his fingers circled his rim. The first knuckle slipped inside when Seonghwa's did.

Seonghwa moaned, for Mingi's fingers were so much bigger than his. He pressed down against them, eager to feel them stretch him open.

This time, it was Mingi who laughed at him. The blushing elf buried his head in Mingi's neck.

"Are the dreams he sent me of you reality? Do you fall apart below him so deliciously?" As he spoke with his scratchy voice, he curled his fingers deeper.

"It's not a matter of his competence or ah- mine. Some enjoy this position, some enjoy the other. I enjoy both. I enjoy affection."

"I like that. Enjoying affection," Mingi hummed as he leaned in to nibble on Seonghwa's shoulder. Their hips circled into each other, opening up at their own pace. Now that Seonghwa showed Mingi how, it came to him naturally.

"I will learn a lot from you and maybe one day I will do what Hongjoong intended me to do. I'm curious if you could take it," Mingi whispered against Seonghwa's ear. Playful teeth tugged on the lobe.

With a stuttered yell of the demon's name, Seonghwa sunk flush to his hand. The finger inside of him pressed into his walls, exploring as if he were looking at a new home.

Seonghwa took a moment to gather his senses. He twisted his wrist, feeling for Mingi's good spot in revenge for the sentence that sent all heat in Seonghwa's body south and made him achingly hard again. He rocked into Mingi's finger, so warm against the softness of his accustomed entrance.

When Mingi's weight slumped into Seonghwa with a guttural moan and almost toppled them over, Seonghwa knew he found it. He caught the gasp and drool off Mingi's lips, kissing him deeply to feel him unravel as Seonghwa massaged into him. One finger became two and soon, they desperately wound against each other, needing something more.

Seonghwa considered leaving it at that, to milk Mingi by his nerve spot and ruin him forever until he couldn't come with his manhood alone. But alas, he promised. And he felt he might go mad if he stared at that mouth-watering treat any longer without ever getting it.

Slowly, Seonghwa withdrew his fingers from Mingi and turned for the box. Mingi followed along, inquisitive about this development.

"I brought something. Replicas made of crystal. They can introduce your body at your own pace without hurting or getting hurt," Seonghwa muttered as he retrieved them. He had three different sizes, each to accommodate the possibilities that might meet him. He guided Mingi's hand to the smallest one, delightfully similar in size to Seonghwa and Hongjoong.

"This one won't hurt you at all. You can take it easily, but you are a big fellow, so I don't know if it's enough for you. If used properly, of course, it might bring you to even better highs than something enormous and unmovable."

Mingi's hand curled around it, nervous as he felt along the length and shape.

Seonghwa brought the next one over.

"This is what we consider large. It's bigger than most elves or humans, but nowhere as big as a demon." As he had learned today.

Once more, Mingi felt around carefully, fingers delicate as if he were touching an artifact and not something to ride until he forgot who he was.

"And this is the biggest I own. I acquired it specifically because I knew one of my husbands could be a greedy demon hungry for my body. Turns out it wouldn't have been enough either way, but a way to ease my concerns. Since it takes a lot of getting used to, I don't recommend it to you today."

Worried, Mingi tilted his head to listen to Seonghwa's voice.

"I would never hurt you," he whispered, scared Seonghwa might think so. When the elf leaned in to kiss him, he exhaled.

"I know. Before I knew you, I was intimidated, but now I'm not anymore."

Mingi nodded, distressed by Seonghwa's prior dread, but he understood it was warranted. He heard enough to know.

"In that case, I will try this one. Going slow." He picked the smallest toy and Seonghwa hummed praise to him. With matters so delicate, there was no need to be competitive.

Seonghwa set the demon size aside next to him and put the box on the ground. As he shuffled closer to his lover, he oiled up the toy Mingi picked and placed it on the bed behind him. The sap at its bottom would keep it in place for as long as it needed to be.

"Here, do you feel it? You can lower yourself on it however fast or slow you desire. Don't hurt yourself," Seonghwa explained as he helped Mingi align his clumsy frame. His knees trembled against Seonghwa's when he complied. Bit by bit, he leaned back to test the give of his body.

Seonghwa intertwined their fingers, holding Mingi steady and spending strength when the demon let his head loll with a whimper. With his free hand, Seonghwa slicked up his own dummy of choice to place it below him. The breach was generous, but ever so exquisite. Though it was colder than Mingi and didn't have the right shape, it was enough to scratch that itch.

"S-Seonghwa," Mingi breathed when his other hand searched for his. Seonghwa grabbed for him, teeth buried in his lip and eyes rolling back when he filled himself. Trembling knees clung to each other.

"Are you feeling good?" Seonghwa panted when Mingi hunched against him, desperately rutting as his body sought constant friction. He took all of the toy, sitting flush against the bed to shudder with the novel sensation. His weeping length smeared over Seonghwa's stomach.

"So good, so good," Mingi whispered. He surged to kiss Seonghwa, impatient to continue even when his body needed time. The sudden force pushed Seonghwa deeper, and he moaned into Mingi's mouth when his back arched and he was split open. Quivering hands and legs clung to Mingi's hot skin.

Curious about his progress, Mingi slipped his fingers down to feel for Seonghwa's spread rim. He sucked in a breath when he felt the girth the elf could take.

"Oh... Perhaps you can make it work, after all."

Seonghwa weakly buckled into him, where he trembled atop his loyal companion.

"Says you. Move your hips. Show me what you can do."

Mingi complied easily. Though his second of confidence evaporated fast when his precious spots got pressed into and he flinched. His deep groan danced across Seonghwa's core.

"This- This is incredible," Mingi grunted as he lifted his hips, dropping back down to throw his head back in euphoria. He couldn't still anymore, chasing his pleasure on the crystal toy as his length wept all over the sheets. He shared his every moan with Seonghwa, and his ecstasy was lovely. As they cradled each other while they felt good, Seonghwa shared a new, intimate part of him he hadn't shown to anyone else before. Mingi's blind trust alone was almost enough to spiral him into the oceans of bliss.

As Seonghwa relished his imagination that the one he was riding was Mingi and the demon would crumble beneath him, a pleasure so pure piqued his heart. The two embraced each other and panted into their kisses as both relished in the shared sensations.

Seonghwa couldn't help himself and reached for Mingi. The demon choked on a moan and sped up, hips jerking between the two places where they sought pleasure.

Caught in a daze of desire, Seonghwa moved his hands, gathering up the slick of Mingi until finally, readily, the demon's hips stuttered. When he peaked, he was so close it doused Seonghwa's arousal; hot and wet.

Seonghwa was losing his mind. He yanked Mingi closer to kiss him, rougher than he usually would be. The demon complied and skimmed dangerous teeth over Seonghwa's swollen lips in return, covering him with his towering body. The elf hiccoughed, so overwhelmed yet so eager for more; to be swallowed up and devoured.

Mingi swiped a thumb over Seonghwa's lip when he pulled back, gathering up his drool.

"For the first time, I sincerely wish I could see. You must look magnificent, falling apart like this."

Whimpering, Seonghwa pressed down, taking as much of his toy inside as he could. His hand gave him the last kick the second he grabbed for Mingi's horn to gasp his orgasm into his mouth.

Mingi drunk it up hungrily, keeping the trembling elf locked in place even when he shuddered and wound himself because it was too good and he felt so full. Only when Mingi let him go, he could slump to the side and Mingi got to touch all that had just been inside of him. His hum was awed.

They left the toys dirty at the side of the bed as Mingi gathered Seonghwa in his arms to curl up with him. The elf trembled through his aftershocks, but he was dutiful in sharing kisses with Mingi and caressing his body.

When they calmed and Seonghwa relaxed in the heat of Mingi's side, he learned words anew.

"How are you feeling?"

Mingi nuzzled Seonghwa's forehead. They were sweaty and the sticky room stank of sex, but they had never been so comfortable.

"Better than ever before. Thank you for doing this with me. It wouldn't have been the same had you just given me the material and left me to it. I had a fantastic time," Mingi confessed as he repainted Seonghwa's facial structure with his fingers.

Soft, Seonghwa kissed his fingertips.

"I'm happy to hear that. Thank you for trusting me."

Attracted by each other, they giggled in the dark of Mingi's room. A night of cuddles awaited them and Seonghwa rolled out of bed begrudgingly only long later, explaining to Mingi it was unwise to remain sticky. Though Mingi laughed about it and called him out for being so clean, he came along for a bath. Seonghwa used the occasion to wash off his instruments as well.

"If you ever need them for your enjoyment, just ask me. I am so occupied with the others, they lost all purpose to me," he sighed as he placed them on the rim of the tub. He lit some candles out of fear both of them slipped and fell to their death with no one there to catch them. Expectedly, Mingi looked most handsome in their dewy light.

The demon leaned his cheek against Seonghwa's hair.

"You sleep with most of them?"

"Yes." Seonghwa was sorry Mingi couldn't be the one, couldn't float on a cloud for their slow discoveries with each other.

With a hum, Mingi wound his arms tighter around the elf. When he kissed his nape, Seonghwa melted into his embrace.

"Alright. If I ever need them, I'll tell you."

Glad he understood and wasn't competitive, envious, or both, Seonghwa turned his head to kiss his fine demon husband. Mingi's onyx eyes were pleasant and deep for him to fall into.