Reigen kisses him once more with a smile, and then dips to press another to his cheek, to his neck, to his collar. Continuing to trail down his body slowly.

Gently.

Brushing lips to pale skin, feeling it jump underneath if he gives licks that lead to another. Down along his chest, the dip of his waist, below his navel. Smooth porcelain skin marked with spots of saliva and warm touch.

Mob's pink-flushed and nervous, a hand cupped over his dick to hide it away. Is he hard? Definitely. Is he too shy to let shishou look? So far, despite loving his oral work so much. He'll grow bolder about it once they go all the way.

Or maybe not.
He's cute when he's shy.

Reigen's hands travel down Mob's smooth thighs, and the muscles underneath clench as he reaches lower: Kneading his little ass more open, brushing his thumb from perineum to rim in slow and light circles. Mob turns his head into the pillow with his lips sealed together, and they part for a shaky breath that he tries to hold in.

"Mo～b," Reigen smiles, against Mob's tightly-cupped and twitching pinky, the smooth and hairless dip of his navel and thigh. "Do you trust me?"

Mob opens his eyes to look at him, and it brings some fresh color to his cheeks. He turns his shy gaze away to the hand squeezing the sheets. Licks his bitten lip to mumble. "...d-don't go too fast."

"Who, me?"

Reigen's thumbs press closer to his cleft to spread his rim open just a bit, enjoying the little shy kicks of Mob's feet as he does. He holds his smile enough to blow air against the twitching muscle.

He exhales a shaking breath from how accepting and easy it feels. Mob's body jumps as he prods his thumb in just up to the nail, pressing on the rim to stretch him open just a little. It squeezes on him like not wanting to let go.

He forgot to breathe back in. It's an unhelpfully thin inhale. "You're soft, Mob. I didn't know it could be like this."

"Nhn– D-Don't look there...!"

Mob tries shifting his kicking legs, sqeezing them closer to his thighs to hide, and Reigen sits up with a thoughtful look.

Mob yelps as he wraps his arms under his thighs instead, pulling him down along the bed to bend over.

His wide eyes are open with surprise against his flushed-red face, chest heaving with breaths that don't fill his lungs from the awkward bend of his torso. Reigen kisses his ass, caressing the dips of his inner thighs, spreading him open. Kissing his rim in little pecks for the alerted little gasps he gives.

"S-Shishou–" Mob's limbs move in little aborted twitches, like he doesn't know what to do with them. He's so red. He's so cute. "Shishou, it's dirty there–!"

"It's not. It's so clean and pretty."

He cleaned Mob up for this, after all. His deshi squirms against the mattress, toussling up his hair, framing the red of his round cheeks. "But–"

"Just enjoy it. I'll make it good." With those words, he sticks his tongue out, the guide to press his mouth against Mob's rim. His lips follow, giving the push to prod his tongue past the small resistance.

"A-Ah– Hwah, s-shish‐...o-oh, oh..."

Mob's body tenses for just a few moments before his muscles spasm to loosen. With each kiss and lick inside, he's melting into Reigen's lap and arms, his body turning to soft and pliable putty. Alert sinks in pleasure, closing his eyes to pant out the moans bubbling up his chest, his fingers holding onto the belt loops of Reigen's pants for something to cling to.

Reigen shifts on his legs a bit and closes his eyes, squeezing Mob close in an embrace to kiss his rim deeper, holding in chuckles from his legs' feeble kicking when he prods the tip of his tongue against soft inner walls. Mob's moans are turning breathier, squirming for more space in his lungs, pleads of shishou in between them.

His legs start squeezing tighter for a hug and Reigen helps lift them around his head, letting Mob pull him in, rock his hips blindly with the pleasure shishou gives. Reigen pulls his saliva-wet mouth off Mob enough to blurt out if he should jerk him off, but Mob shakes his head like a child and pulls him back with his shins, and he happily continues eating his little deshi out.

Mob's eyes are teary, biting his lip for just a moment, higher and higher breaths until his body clutches for Reigen's. The shudders of his climax run down his spine to the tips of his fingers and toes. His mouth hangs open, loud and unabashed– And he spills onto his own chest, a sight that gets recorded in HD to Reigen's memory.

His tongue draws back into his mouth. He presses a little peck to Mob's kissed-red rim to draw away, dropping his cheek onto his still-twitching butt.

"You're such a pretty thing, Mob..." He pants it out, pants rustling by shoving his boxers off his dick, stroking it firmly while breathing Mob's climax-warm scent. It's intoxicating, bringing a drunk flush to his cheeks. "I can't wait to fuck you."

Though, with the way Mob's body reacts just to his words, reacts to being watched as his shishou gets off, he won't have to wait for long.