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It's not that Ritsu didn't realize that giving a ghost such ready access to his body might not work out well for him, he just...had sort of figured he'd work through it when the time came. Worst case scenario, he could always just ask Shigeo for help.
Except, this is not the worst case scenario he'd anticipated, and he definitely can't ask for Shigeo's help now.
"God, are all teenagers this sensitive, or are you just like this?" Dimple's voice rings in his head as he manipulates Ritsu's body. He's got Ritsu's hands shoved up his shirt, tweaking his nipples with harsh little pinches and twists. Ritsu feels it all, every little spark of pleasured pain that zings from his chest down his spine and makes his hips twitching up involuntarily. But he has no power to stop it, trapped in his body and only able to watch, to feel, as Dimple uses his own hands to touch him.
Dimple tugs on his left nipple, rolling it between his thumb and forefinger. The moan that leaves Ritsu's mouth belongs to both of them.
"I really lucked out with you," Dimple says, and even his voice in Ritsu's head sounds breathy and pleased. "Your body really feels everything so intensely. Too straight-laced to masturbate?"
"S-shut up!" Ritsu demands, which is about all he can do; Dimple seems content to give him control of his mouth and nothing else.
"Well now, let me see..." Dimple ignores Ritsu entirely as he pushes Ritsu's pajamas and briefs down his legs, kicking them to the end of the bed. His right hand doesn't go right to Ritsu's cock, as he'd feared (and maybe was anticipating, some animal part of his brain unconcerned with the extra passenger in his body, soaking up every sensation, only interested in bringing those sensations to their natural conclusion). Instead, he drags Ritsu's nails lightly up the insides of Ritsu's thighs, the dual experience of knowing it's his own body creating these sensations at odds with his inability to know what'll happen next, making everything hit just a little harder than it should. Ritsu sees his own cock jump, already half-hard from Dimple's earlier play.
"If you're gonna do it, just get it over with already!" Ritsu grits out, still fighting for control against both Dimple and his body's increasingly traitorous reactions.
"Are you kidding? It's not every day I get to feel you know, I've got to enjoy it. Unless you're suggesting we make this a regular thing? I bet I could show you how to make your body sing, little Ritsu."
Dimple says all of this while petting down his thighs, drifting aimless fingers over his balls and shaft, before reaching just as far back as he can and stroking lightly over Ritsu's asshole. Ritsu would've jumped in shock, if he had any control over his body. As it stands he just has to feel as his body reacts independently of his mind, all tingling excitement and sweet tension.
"Wait--Dimple, I've never--" Ritsu stammers, as mortified as he is panicked.
"There's a first time for everything," Dimple replies glibly, though he does reach over to the night stand for a bottle of lotion. It occurs to Ritsu that they should check if it's okay for internal use, but he's not sure he wants to test an evil spirit's good will. "Good thing you've got an expert showing you what to do."
The touch of his own slick, cool fingers to his entrance really does make him jump this time, his body tensing against the unfamiliar pressure.
"Don't you ever relax?" Dimple asks, as he makes Ritsu take deep breaths, forcing the tension out of their shared body. It works just enough to get the tip of a finger inside.
Weird, it's weirdweird weird . Not painful, and Ritsu thinks, forlornly, that maybe if it did hurt that might be the push he needs to break the possession.
But no, it doesn't hurt, it just feels strange. Strange until it doesn't, just interesting and almost pleasant, Dimple slowly working his finger in as much as the angle will allow.
"There we go, you've gotta learn to enjoy your body more kid," Dimple breathes out, speeding up his movements just a little, the underside of Ritsu's arm brushing against his cock, keeping him stubbornly hard through the intrusive play. "Maybe we'll find a way to get something for you, a nice toy to play with."
"Ugh," Ritsu groans, pretending to himself that it's an admonishment of Dimple and not a reaction to how very nice his own finger in his ass is starting to feel. He knows, vaguely, that this is something people do and enjoy, and he's starting to reach the point where he's very curious as to precisely how this will feel good. "You're such a pervert."
"No shit?" Dimple asks, pressing a second slippery digit into Ritsu's hole. God, the stretch, the slight burn of it, it makes Ritsu's legs feel weak, falling further open without any input from himself or Dimple, just a natural response to stimuli. His hole feels so tight against his fingers, so unyielding, and yet they fit, keep pumping in and out, pushing little breathy noises out of him that seem to amuse Dimple to no end, or turn him on in whatever way a ghost can be. Ritsu's feeling harder than ever, at any rate.
But it's not enough, and it's getting increasingly, frustratingly clear to Ritsu that it won't ever be enough. Maybe if there were more, or deeper or, or, Ritsu doesnt know, he just knows that his cock and balls have been teased half to death with incidental strokes, his nipples are still tingling from before, and his whole body is begging for something that he has no power to give it.
Luckily (or not) Dimple doesn't seem to have possessed him with the intention of giving himself blue balls. When he finally puts Ritsu's other hand to good use stroking his cock, Ritsu's body nearly sobs.
"Fuck, that's it," Dimple says, his voice panting through Ritsu's mouth as he manages, with more coordination than Ritsu can account for, to stroke them off and finger them at the same time. "You're body's so sensitive Ritsu, bet you'd feel so good getting fucked, you should try it sometime."
"H-hell no!" Ritsu stammers out, caught between trying to hurry his body along and getting carried away in the flurry of sensation building up within him.
Dimple grins, Ritsu can feel it in his mind and on his face. "Maybe we'll take you out for a spin sometime?"
Oh god, Ritsu can feel his balls tightening, his body hurtling toward the finish line, now that Dimple's touching him properly. "Don't you dare," he manages to groan out, desperate and unconvincing. He doesn't want it, doesn't want this, doesn't want to feel this way at Dimple or anyone else's hands, just wants it over, over, over--
Ritsu comes, hard, his whole body singing as wave after wave of orgasm crashes through him. He's fascinated, enthralled by the pulsing of his hole against his fingers, that new delicious feeling pushing him that much higher as his cock spurts cum across his stomach and hand.
The orgasmic buzzing in his head is so pleasant, so all-consuming that he forgets he's not alone in his body until he is, Dimple floating over his flush, sweaty face and grinning. "Damn little Ritsu, you really are one hell of a ride."
The withering glare Ritsu sends his way is weak and he knows it. "I'm gonna have nii-san exorcise you tomorrow," Ritsu says, instead of any of the dozens of incredulous replies flying around in his head.
"Hey! Is that any way to repay the guy who just gave you the best orgasm of your young life?!"
Ritsu just rolls his eyes, rolls away so his back is to the spirit.
"Tomorrow, Dimple. Exorcism, bright and early. Hope it was worth it."