She teaches him a lesson

Hinata stopped, staring down at his little dick as it spurted cum all over their stomachs despite not being touched yet "Did you just cum? Naru-chan, if you always cum this fast then we have a problem" she said with a frown, her pale eyes staring down at him as his cum slowly rolled down her breasts. He blushed, feeling humiliated at how quickly he blew his load. It's not his fault this felt so good!

Hinata slowly and reluctantly pulled out of him with a slow sigh, her cock swinging in front of her as she went to a nearby dresser. Naruto couldn't stop staring, finding it hard to believe he'd had that huge cock inside of him. He flicked his gaze to her hands as she pulled something small and pink from the draw she was rumaging in.

"I didn't think I'd actually need this" She said, coming over to him and gently grabbing his soft, leaking cock and sliding a pink ring over it, ignoring his squirming as she pulled his balls through it "I was worried it might be too small, but honestly it might be a bit too big" she commented idly as she slid a pink cage over his dick and locked it to the ring

"There we go, that should stop you from cumming so fast" she said with a satisfied smirk, hanging the key to the pink chastity cage around her neck, the key settling between her huge tits

"Wh-what the hell Hinata?? Get this thing off me" Naruto said, squirming at the tight cage locked around his dick "Please, I'm so sorry, I won't cum so fast again I promise" he pleaded, eyes locked on the key