Pretty good. Hope you don't mind if I offer up a few corrections, though. You have to take figures of speech into account (difficult, I know).
Alright! Let's go like this!! I won't let anyone else touch him~!!Ryuuji('s thing) is miiine!!My tail, your hips, whatever, let's get 'em shaking!!M-my nipples... rubbbing...
S...sto-...!!Sto...Ryuuji...nhg