She needs to get something to mark her ownership

As Futaba started masturbating, you took off her apron.

“Futaba, I thought I ordered you to have something adorning your body by today. Today was supposed to be our special day!” You say condescendingly.

“I’m Sorry Master” Futaba said as she frigged on her knees.

“I didn’t even care what it was, a collar, a vibrator with a remote control, chastity belt, pierced nipples with a chain to pull on, even just a submissive tattoo. Something to demonstrate you were owned. You probably wore the apron hoping I wouldn’t notice.” You said.

“I-I’m sorry Master, but every t-t-time I go out to try I get too emb-b-bah-barrassed to do it in public, and if I trah-try to order it at ho-home I get afraid Sojiro might s-s-see it and-and that’s like an extra level added by the developers for super hardcore gamers and-

Futaba was clearly on the edge already. You never would have guessed she was so easy. There was no need to rush though, Futaba knew better than to orgasm without your permission.

“Enough, clearly this was my fault. I should have known better than to let a **** act on her own. You do still know where all the shops to get something done are, right?” You ask.

“Yesyesyes Ma-ah-ster! I can show you to anywhere you want to go!” At this point Futaba’s eyes were shut tight in pent-up frustration

You walk up to her and rustle her hair like a dog. “Gooood Giiiirrrl. Now I need you lucid to show me around, so cum.”

“AAAAAARRRRRRRROOOOOOHHHHHHUUUUUUUUHHHHH!”

“Now before we head out you missy need to be punished.”