A chastity cage

Haku looked at the odd contraption with equal parts interest and dread. It was a metal contraption that looked very much like a penis, and it came along with a heart-shaped lock to make sure nobody without the key could take it off. He twitched, not even needing to ask where this particular monstrosity was going to be placed.

"It's the smallest one in my collection," informed Anko, using her finger to flick his unimpressive member. "It should make sure that you don't do any naughty things with your extra little friend here."

The feminine boy squirmed a bit but still glared. "You're not putting that thing in me!"

Anko licked her lips. "Oh yes I am! I told you... my house... my rules. You might have seen that given my history, I'm juuust a little paranoid. There's two things I won't have living under my roof, pretty boy. No chakra users and no dicks... even one as small as yours," she almost whispered that little insult. "The only cock I'm comfortable with is the ones I wear... thought that can come later."

Haku ignored the last part, too busy watching as the purple-haired kunoichi grabbed his fun-sized balls and inserted a metal ring around them, tugging on it to make sure it wouldn't slip. Once the sadistic woman was satisfied, she grabbed the other part of the cage and slid it on his deflated little dick, securing it all with a pink padlock.

At least she was satisfied, Haku thought as he watched Anko grinning, circling around him and lightly smacking his sensitive wet ass. "Such a pretty boy," she cooed. "And he's all mine!"

The feminine boy sighed as the woman finally unlocked his restraints and led him out of the bathroom, hoping that he would be clothed soon.