Start by telling her to strip

"Please strip."

"Ah, but?"

"Would you like me to do it? But that would be more difficult for you right?"

She nodded and slowly undressed.

Midori demurely covered her naked body but you gently pulled her arms away.

"Nice," you complimented.

"Thank you."

"Did Ri... Aoki-san said anything you're supposed to do."

Midori nodded and said, "She said that you like to play with toys before starting," She then got up and got a dildo and a massager.

It wasn't true that you like using toys, but you're curious to see where this was going.

"Aoki-san said that you would first start with the dildo and then get me to put it in my pussy," Midori then pushed the dildo into her pussy and started to push it and out of her.

After quite sometime, her breathing became heavier. Then Midori stopped, and then turn on with the massager. She put the spinning and vibrating massager at her pussy. "Finish it with this."

You watch with fascination as Midori brought herself to an orgasm.

"Because I'm lonely, you want me to play with myself," she said as she approached her peak. "I'm cumming," she moaned as the machine brought her the needed release.

The interesting part with whole situation was that Rikako never told her to masturbate in front of you. Rikako simply said that Midori needed to show you what she wanted. But if Midori was thinking that you liked to see her masturbate, far from it from you to correct her. You enter you fingers into her wet pussy and moved it in and out of her until she climaxed again a few minutes later.